Fire aboard a ship undergoing repairs killed two workers and sent two other people to the hospital, authorities said.

Monday's fire was started by a welder's spark in an elevator shaft area, authorities said.The men who died were in the hold of the vessel, the All-Alaskan, which was being converted from an oil drilling rig to a fish-processing ship, said Larry Schatz, a fire department dispatcher.

About 30 Tacoma firefighters responded to the blaze at Pier 23, said Schatz.