Authorities served search warrants Sunday at the Southern California company that owned the scuba diving boat that caught fire and killed 34 people last week.

Agents with the FBI, the Bureau of Alcohol, Tobacco, Firearms and Explosives and other agencies searched Truth Aquatics' offices in Santa Barbara and the company's two remaining boats, Santa Barbara County sheriff's Lt. Erik Raney said.

The warrants served shortly after 9 a.m. are "a pretty standard" part of the ongoing investigation into the tragedy to determine whether any crimes were committed, he said. The office was ringed in red "crime scene" tape as more than a dozen agents took photos and carried out boxes.