Malaysia Airlines Flight 17: Ukraine Says Plane With 295 On Board Shot Down

A Malaysia Airlines passenger plane carrying 295 people was shot down over eastern Ukraine on Thursday, Ukrainian officials said, and both the government and the pro-Russia separatists fighting in the region denied any responsibility for downing the aircraft.

CBS News national security correspondent David Martin confirms that U.S. intelligence says the plane was brought down by a missile but it is not clear where the missile was fired from.

As plumes of black smoke rose up near a rebel-held village of Grabovo, an Associated Press journalist counted at least 22 bodies at the wreckage site 25 miles from the Russian border.

A Russian news report said pro-Russia rebelsintend to call a three-day cease-fire to allow for an investigation into the crash and recovery efforts.

The Boeing 777-200ER plane, traveling from Amsterdam to Kuala Lumpur, appeared to have broken up before impact and the burning wreckage - which included body parts and the belongings of passengers - was scattered over a wide area.

Ukrainian President Petro Poroshenko called the downing an act of terrorism and called for an international investigation into the crash. He insisted that his forces did not shoot down the plane.

The government of Ukraine said in a statement Thursday afternoon that it hasevidence that the Russian military was involved in the crash.

Ukraine's security services produced what they said were two intercepted telephone conversations that they said showed rebels were responsible. In the first call, the security services said, rebel commander Igor Bezler tells a Russian military intelligence officer that rebel forces shot down a plane.

In the second, two rebel fighters - one of them at the scene of the crash - say the rocket attack was carried out by a unit of insurgents about 25 kilometers (15 miles) north of the crash site.

Neither recording could be independently verified.

Rebel leader Igor Girkin (also known as Igor Strelkov) apparently deleted a statement online saying his "militia" had just downed an aircraft, thinking it was an Antonov AN-26 military plane. CBS News obtained a cached version of the post, in which he said Ukraine was warned not to "fly in our skies."

CBS News' Martin reported that the missile that took down the plane would have had to be a Russian-made surface-to-air missile system, complete with radar, fire control, launcher and missile. A shoulder-fired missile could not have reached that altitude.

On two occasions earlier in the week, Martin reported, U.S. intelligence determined that surface-to-air missiles had shot down a Ukrainian cargo planeand a Ukrainian Frogfoot jet fighter. Both of them were flying above 20,000 feet, which is above the range of shoulder-fired missiles.

Martin reported that the system which detects ballistic missile launches did not detect a launch that could have brought down the airliner, but it is not programmed to do that. There are satellites and ground-based radars capable of detecting this kind of missile, so the evidence almost certainly exists.

CBS News correspondent Margaret Brennan reports that surface-to-air missiles are at the very top of the list of weapons that the U.S has been trying to get Russia to stop providing to the pro-Russian separatists in Ukraine. Those weapons-makers were among those targeted in the most recent round of sanctions levied Wednesday.

President Barack Obama called the crash a "terrible tragedy" and talked about it on the phone with Russian President Vladimir Putin.

The State Department could not immediately confirm if any Americans were on board, Brennan reported. Reuters, citing Interfax, reported that that there may have been 23 Americans on board.

The village of Grabovo is currently under the control of pro-Russia separatists and the area has seen severe fighting between the two sides in recent days.

Aviation authorities in several countries, including the FAA in the United States, had issued warnings not to fly over parts of Ukraine prior to Thursday's crash. Within hours, several airlines, including Lufthansa and KLM, released statements Thursday saying they were avoiding parts of Ukrainian airspace.

Eurocontrol, an agency that coordinates European airspace, said the Malaysian jetliner was flying at 33,000 feet -- 1,000 feet above a closed section of airspace.

"According to our information, the aircraft was flying at Flight Level 330 (approximately 10,000 meters) when it disappeared from the radar," Eurocontrol said, according to Reuters.

Malaysia Airlines said Ukrainian aviation authorities told the company they had lost contact with Flight MH17 at 1415 GMT (10 a.m. EDT) about 20 miles from Tamak waypoint, which is 30 miles from the Russia-Ukraine border.

It said the plane was carrying 280 passengers and 15 crew members. It had left Amsterdam at 12:15 p.m. and was due to arrive at Kuala Lumpur International Airport at 6:10 a.m. Friday.

Anton Gerashenko, an adviser to Ukraine's interior minister, said on his Facebook page the plane was flying at an altitude of 33,000 feet when it was hit by a missile from a Buk launcher, which can fire up to an altitude of 72,000 feet.

Igor Sutyagin, a research fellow in Russian studies at the Royal United Services Institute, said both Ukrainian and Russian forces have SA-17 missile systems - also known as Buk ground-to-air launcher systems.

He said Russia had supplied separatist rebels with military hardware, but he had seen no evidence "of the transfer of that type of system from Russia." The weapons that the rebels are known to have do not have the capacity to reach beyond 14,750 feet.

A launcher similar to the Buk missile system was seen by Associated Press journalists earlier Thursday near the eastern Ukrainian town of Snizhne, which is held by the rebels.

The Malaysia Airlines plane was delivered to the company on July 30, 1997, according to Flightglobal's Ascend Online Fleets. It has more than 43,000 hours of flight time and 6,950 takeoffs and landings.

Poroshenko said his country's armed forces didn't shoot at any airborne targets.

"We do not exclude that this plane was shot down, and we stress that the Armed Forces of Ukraine did not take action against any airborne targets," he said. "We are sure that those who are guilty in this tragedy will be held responsible."

The Kremlin said Putin "informed the U.S. president of the report from air traffic controllers that the Malaysian plane had crashed on Ukrainian territory" without giving further details about their call. The White House confirmed the call.

Separatist leader Andrei Purgin told The Associated Press that he was certain that Ukrainian troops had shot the plane down, but gave no explanation or proof for his statement.

Purgin said he did not know whether rebel forces owned Buk missile launchers, but said even if they did, they had no fighters capable of operating it.

It was the second time that a Malaysia Airlines plane was lost in less than six months. Malaysia Airlines Flight 370 disappeared in March while en route from Kuala Lumpur to Beijing. It has not been found, but the search has been concentrated in the Indian Ocean far west of Australia.

Dutch Prime Minister Mark Rutte, who had been attending a European Union summit in Brussels, headed back to the Netherlands to deal with fallout from the crash.

There have been several disputes over planes being shot down over eastern Ukraine in recent days.

On Wednesday evening, a Ukrainian fighter jet was shot down by an air-to-air missile from a Russian plane, Ukrainian authorities said Thursday, adding to what Kiev says is mounting evidence that Moscow is directly supporting the separatist insurgents. Ukraine Security Council spokesman Andrei Lysenko said the pilot of the Sukhoi-25 jet hit by the air-to-air missile was forced to bail after his jet was shot down.

Russia's U.N. Ambassador Vitaly Churkin told reporters at U.N. headquarters in New York on Thursday that Russia did not shoot down the Ukrainian fighter jet on Wednesday. "We didn't do it," Churkin said.

Pro-Russia rebels, meanwhile, claimed responsibility for strikes Wednesday on two Ukrainian Sukhoi-25 jets.

At least two Russian news outlets reported at the end of June that pro-Russian rebels had seized a Ukrainian airbase in the Donestk region where Buk missile systems were located. It wasn't clear how long the rebels maintained control of the "A-1402 military base," or whether any Buk systems had been removed from it.

The Ukrainian Defense Ministry said the second jet was hit by a portable surface-to-air missile, but added the pilot was unscathed and managed to land his plane safely

Moscow denies Western charges that is supporting the separatists or sowing unrest in its neighbor.

Earlier this week, Ukraine said a military transport plane was shot down Monday over eastern Ukraine by a missile fired from Russian territory.

Other passenger planes have been shot down before including:

- April 20, 1978: Korean Airlines Flight 902, which diverted from its planned course on a flight from Paris to Seoul and strayed over the Soviet Union. After being fired upon by an interceptor aircraft, the crew made a forced landing at night on the surface of a frozen lake. Two of the 97 passengers were killed by the hostile fire.

- Sept. 1, 1983: Korean Air Lines Flight 007 shot down by at least one Soviet air-to-air missile after the 747 had strayed into Soviet airspace. All 240 passengers and 29 crew were killed.

- July 3, 1988: Iran Air Flight 655 Aircraft was shot down by a surface to air missile from the American naval vessel U.S.S. Vincennes. All 16 crew and 274 passengers were killed.

© 2014 CBS Interactive Inc. All Rights Reserved.