Updated

A hospital official in Oklahoma City says more than 75 people were injured during a burst of severe storms and tornadoes on Friday night.

Integris spokeswoman Brooke Cayot said Saturday that the hospital chain had treated 77 people. One remains in critical condition.

Five people died during the storm, which struck the Oklahoma City area during rush hour, trapping many people in their cars along Interstate 40.

The National Weather Service reported Friday evening that "several" tornadoes rolled across the prairie. The official number of tornadoes has not yet been determined.