OKLAHOMA CITY (AP) - No damage or injuries have been reported from a line of severe thunderstorms that spawned at least one tornado in Oklahoma overnight.

Caddo County Emergency Management Director Larry McDuffey says there was damage in the cities of Anadarko and Gracemont last night, although officials aren't sure if it was caused by a tornado or straight-line winds.

The Oklahoma Highway Patrol reported that downed trees and power lines had led to the closure of U.S. Highways 62 and 281, effectively closing off Anadarko to traffic from the east.

McDuffey added that dozens of inmates were evacuated from the Caddo County jail because of a gas line break.

A tornado was also reported near Tonkawa in Kay County, although emergency management officials couldn't locate a damage path.

As many as 8,000 customers were without electricity at one point.