Severe thunderstorms Wednesday night spawned several tornadoes across Oklahoma, causing some property damage but no serious injuries.

Two mobile homes and a barn were destroyed in northern Oklahoma, Stillwater Emergency Management's Rob Hill said.

Several homes and businesses were also damaged, Hill said, but no injuries were reported.

In Murray County, a tornado took the roof off a barn north of Sulphur.

Two truck drivers were moderately injured and transported to hospitals when high winds overturned their tractor trailer trucks.

As many as six tornadoes touched down, including a series of smaller tornadoes in the south.

Power lines were down in some areas, and the weather service issued a flash flood watch.

Some roads were flooded in northern Oklahoma. Forecasters warned more rain could produce more flooding. 

A tornado watch remained in effect until 2:00 a.m. Wednesday morning.

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AP contributed to this report.