Houston police said the bomb threat at a north Houston church has ended.

A Houston police source said officers responded to a "report of something going off" near a vehicle at Lindale Church of Christ located in the 6100 block of Enid near Melbourne Friday morning.

Houston police believe the small explosion was caused by people horsing around.

Authorities said the group took off after seeing someone walking by. That witness called police.

Officials said they pickup up remnants of a plastic milk jug. They are investigating to figure out what substance was in the jug.