Investigators were combing through a New York City shipyard on Saturday trying to find the cause of a fire and an explosion that killed one person and injured more than 30 firefighters and other first responders.

Authorities provided no major updates to the incidents that occurred Friday afternoon in the Mariners Harbor neighborhood on the north shore of Staten Island. Besides investigators, some firefighters were at the site as a precaution Saturday, officials said.

Firefighters were called to the shipyard about 3:30 p.m. Friday on reports that there was a fire, heavy smoke and two workers trapped in a basement area, city Fire Commissioner Lillian Bonsignore said. Less than an hour later, as firefighters and emergency medical personnel were working the scene, an explosion rocked the site, officials said.

A civilian died, and another was wounded. Authorities said a fire marshal and a firefighter were seriously injured, while 29 firefighters had minor to moderate injuries and four emergency medical personnel had minor injuries. All were taken to area hospitals.

“We got very lucky this day,” Bonsignore said at a Friday evening news conference. “We got lucky in the sense that none of our people were killed. It’s unfortunate we had one fatality, and they did everything they could to get to that person.”

The name of the person who died had not been released as of Saturday.