A privately owned cabin cruiser boat carrying 20 people sinks in San Francisco Bay near Alcatraz Island, leaving one person dead and three missing, according to local fire and police officials and the US Coast Guard. Fire Chief Dean Crispen says responders received reports around 3:35 p.m. local time that a boat was on fire about 600 yards off Alcatraz. When crews arrived, the boat had capsized. Rescuers attempt to resuscitate one person; the person is later declared deceased, according to Crispen.

Authorities initially report two missing, then update the number to three based on witness statements. The remaining 16 passengers are rescued. At least one passenger suffers severe injuries in the water, and the fire department says the search for those missing continues through the night. Search efforts include the use of thermal imaging, tide prediction and modeling to guide responders, with helicopters, planes and rescue boats involved.

Officials do not confirm whether the vessel was headed to Alcatraz. Reports also describe the passengers as mostly family members traveling in connection with a memorial service.