NORMAN, Oklahoma - Interstate 35 in Norman is now back open after a semi-truck crash shut down the southbound lanes near Tecumseh Road early Sunday morning.

It happened at around 3:30 a.m. Sunday. The semi hit two cars and then rolled over on I-35, according to the Oklahoma Highway Patrol.

As of 3 p.m. Sunday, all southbound lanes are back open on I-35. The ramps and lanes are also back open at Tecumseh Road.

The cause of the crash is still under investigation. It is unknown if anyone suffered injuries.

News 9 and will keep you updated as more information becomes available.