An explosion injured two people and forced the evacuation of 90 families from a Lehi apartment complex Tuesday morning.

Ninety families in Lehi were forced to evacuate their apartments after an early-morning explosion that injured two people and set off the building's sprinkler system, authorities said. The blast happened shortly after 4 a.

An early morning explosion in a Utah apartment injured two people and led to the temporary relocation of 90 families in the building because the sprinkler system was damaged, officials in Lehi said Tuesday.

The circumstances of the explosion at a Lehi, Utah apartment complex were "considered suspicious," a city communications manager said.