Police are investigating a small explosion outside a Boys & Girls Club in Fresno Tuesday morning.
It happened around 8:30 a.m. on Fulton, near Fresno's Tower District.
Trash collectors were picking up dumpsters when they heard a loud explosion.
Police and fire crews responded and determined the explosion came from a homemade chemical bomb.
Sean Johnson with the Fresno Fire Department said, "These types of devices are sometimes thought of as a prank; they're very dangerous. You shouldn't mess around with any type of pressurized device; you can get yourself hurt.
The Fresno police are trying to figure out who may have planted the device.
There were no injuries.
