OKLAHOMA CITY -- The FBI and Oklahoma City police are investigating a morning bank robbery on May Avenue.

BancFirst, located at 11001 N. May Avenue was robbed at about 10 a.m. Wednesday.

Authorities said the suspect entered the bank and gave the teller a demand note. The suspect kept her hands in her pockets to suggest she had a weapon, although no weapon was seen and no one was injured.

The suspect gathered the money, walked to the north side of the bank and ran westbound.

The robbery suspect is described by police as a black, masculine female in her 20s to early 30s. The suspect is thin, around 120-130 lbs, and 5'9" to 5'11". The supect was wearing a grey sweatshirt with large red letters spelling "NOC" on the front with blue jeans, white running shoes and a black beanie cap.

If anyone has any information, please contact the FBI at 405-290-7770.

A reward of up to $2,000 is being offered by the Oklahoma Banker's Association.