SPUR, Texas (AP) — Fire officials in Fort Worth, Texas, say two children were electrocuted by power lines downed during violent weather.

Spokesman Lt. Kyle Falkner said two boys, ages 11 and 12, were killed Wednesday evening in a heavily wooded area near Oakland Lake Park.

Severe thunderstorms, some that included tornadoes, hit north Texas and Oklahoma on Tuesday. Oncor, the local electric utility in Fort Worth, reported damage to its system after the storms went through, including in the Oakland Lake Park area.

The severe weather threat shifted east Wednesday, covering an area from near Kansas City, Missouri, to the Gulf Coast. Even stronger storms are expected today in parts of Mississippi and Tennessee.

A tornado classified by the National Weather Service as EF-0 to EF-1 struck an apartment complex in southwestern Houston Wednesday morning. The wind damaged carports, windows and roofs but caused no reported injuries. The ratings mean the storm winds were estimated at 60 to 110 mph.

By afternoon, damaging winds dropped a shipping container on a truck, injuring two people, at the Barbours Cut container port near LaPorte, about 20 miles east of Houston. Port of Houston spokeswoman Lisa Ashley said about 20 shipping containers were scattered by the wind. The area was under a tornado warning at the time of the incident, but Ashley said she could not confirm the wind was a tornado.