First responder in Texas explosion arrested

A first responder in the Texas fertilizer explosion was arrested for possession of a destructive device.

Bryce Reed was one of the speakers at a memorial for the victims.

His arrest has not been tied to the deadly blast.

The cause of that explosion is now a criminal investigation.

Fourteen people were killed last month when the fertilizer plant caught fire and exploded.

So far, four possible causes have been ruled out.

Investigators have interviewed more than 400 people to try to figure out exactly where that fire started.