A 2-alarm fire at a Salvation Army facility in Gilroy destroyed $5,000 worth of donations.

Monday’s 2 a.m. blaze is being investigated as suspicious by the Santa Clara County Sheriff’s Office and Gilroy Police Department.

Flames spread through a trailer filled with donations.

Workers at the Salvation Army said the trailer has been broken into several times before at night, and the thieves use candles to light their way through darkness.

Workers suspect a thief’s candle sparked the fire.

The Gilroy Fire Department wrote on Facebook, “Crews responded to the Salvation Army store on Camino Arroyo, where they found a 53 (foot) trailer on fire up against the loading dock. The fire extended into the building but was held in check by the sprinkler system.”