MANCHESTER - Investigators believe someone was trying to siphon gas from a U-Haul box truck Friday morning, triggering a blaze that damaged three trucks at the Hooksett Road facility.

Police Lt. Maureen Tessier said investigators have not determined how the fire started, but believe it happened when someone tried to siphon gas out of a truck parked at the 443 Hooksett Road business. Investigators found a heavily charred gas can between the two destroyed trucks.

It's possible, she said, the person or people involved in the incident suffered burns from the flames. Investigators called local hospitals to see if anyone sought medical attention, but so far no one has, according to Tessier.

Two large box trucks, parked in the rear lot, were in flames when firefighters arrived after the fire was called in about 5 a.m. They quickly extinguished the fire which also damaged a third truck.

Anyone with information about the fire is asked to call police at 668-8711. Anonymous tips for cash rewards may be made through Manchester Crimeline at 624-4040 or online at manchestercrimeline.org .