MANCHESTER — Three fires were set within a two-block area in a 12-minute span Saturday night, authorities said.

Fire investigators and Manchester police were investigating the arsons, which were reported about 8:30 p.m., according to District Fire Chief Michael Gamache.

A fire at 566 Somerville St. involved two large trash toters that were against an occupied residence. A fire at 150 Wilson St. was set in a trash can next to an exterior 275-gallon oil tank and adjacent to an auto body shop. All three trash containers were destroyed, but the structures sustained no damage because of the quick response by residents and fire crews from the Somerville Street station, Gamache said.

A small brush fire was set against a stockade fence at 481 Dix St., causing minimal damage, he said.