Despite extensive search efforts, authorities had found no additional survivors, said Coast Guard Sector San Francisco Commander Jarod Toczko.

One person has died and three others are missing after a pontoon boat capsized around 600 yards from Alcatraz Island on Tuesday.

San Francisco Fire Chief Dean Crispen reported the toll and said crews that arrived on the scene near Alcatraz Island found a three-deck pontoon vessel almost fully under water, with the motor still r...