A mother and child are among five killed as tornadoes hit the Oklahoma City metropolitan area, trapping people in their vehicles.Oklahoma police officers have said a mother and baby were among five killed after a tornado struck a highway near Oklahoma City.

Highway Patrol trooper Betsey Randolph said officers found the bodies of the woman and her daughter near a vehicle along Interstate 40 between El Reno and Yukon.

The tornado hit during evening rush hour, smashing vehicles along a major highway near the city, with reports of several motorists injured and others missing.

The Oklahoma medical examiner's office confirmed five people had been killed, and 50 others hurt - five of them critically. Ann-Dee Lee, of the Office of Emergency Management, said 80,000 people had been left without power - with nearly 64,000 in the the Oklahoma City metropolitan area.

She told Sky News: 'We have numerous reports, although we do not have data, of other injuries and homes that were damaged, but we expect to have a lot better information in the morning when the sun comes up.'

Two thousands passengers at the city's Will Rogers World Airport were moved into underground tunnels and no flights were arriving or departing.

The warning also covered Moore, where 24 people were killed by a deadly storm on May 20. Flash flooding and severe thunderstorm warnings were in place for several areas..