Residents outside of Houston, Texas, were warned to stay indoors Tuesday after fire ignited in a chemical warehouse in Pasadena.

The warehouse, owned by Controlled Solutions, is about 20 miles southeast of Houston. It contained pesticides, according to fire officials, along with wood and paper.

Residents in Pasadena, El Lago, Taylor Lake Village and Seabrook were warned to stay indoors as a cloud of dense black smoke loomed over the area.

There were no reports of injuries, and firefighters were unsure as of Tuesday morning what caused the fire. Balls of flame and black smoke were visible for miles. Firefighters from neighboring fire departments and from oil refineries were called into help fight the blaze.

The smoke was drifting southeast Tuesday morning.

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