At least three people were seriously injured on Wednesday when a tornado hit a gas drilling rig in northern Texas, the Weather Channel reported, citing the Hemphill County sheriff.
It said the drilling rig is near Canadian, a town of nearly 3,000 residents that is about 100 miles (160 km) northeast of Amarillo in the Texas panhandle.
The Hemphill County sheriff could not immediately be reached for comment.
Storms have battered Texas this week, killing at least 15 people in weather-related incidents, including six in Houston.
The death toll in the state was expected to rise, with about a dozen people still missing and a new round of thunderstorms pelting the already flooded cities of Houston and Austin.