A suspected arson on Halloween night destroyed or damaged more than half the truck fleet at One Big Man & One Big Truck Moving Company in San Francisco’s Bayview, KTVU reported.

Co-owner Wolf Matt said the fire broke out shortly after 11 p.m. at a property he leases from the Port of San Francisco. He said four trucks were destroyed and one was damaged, affecting more than half of a nine-vehicle fleet, and that each truck costs about $150,000 to replace. Employee Mark Ryser, first to arrive the next day, said he saw scorching on a door and thought someone had also tried to burn the building. Matt, who said the company was founded in 1983 and that he became an owner in 2001, employs 18 people; he said this was the fourth arson on the port property in two years, though the first to hit his business, that cameras did not capture the blaze because they were not aimed at the vehicles, and that the lot has no lighting. A Fire Department spokesman told KTVU investigators have not ruled out arson and declined further details. Matt’s comments about a possible target or a person “who just has a disorder” are his speculation, not a finding. The company has used rentals and has not canceled jobs, Ryser said, and Matt started a GoFundMe fundraiser. No injuries were reported.