An investigation is underway after an explosion and subsequent fire prompted both police and fire department responses Friday evening, according to an online blotter entry.

Police say residents near 1900 W. Uintah St. reported an explosion and fire in an alley just before 6:45 p.m. Firefighters found an incendiary device on scene, the blotter entry states.

Arson investigators and regional explosive units responded and recovered evidence, and the investigation will continue, according to police.

It is unclear if any arrests were made or if police have any leads. No suspect information was released in the blotter entry.