Nearly two dozen passengers aboard a boat near Alcatraz Island in the San Francisco Bay were rescued when the vessel started sinking Friday night, according to the U.S. Coast Guard.

The 22 passengers and crew aboard the Neptune, a 45-foot boat, were safely rescued after the boat struck a shoal near the north side of Alcatraz and started taking on water, according to the USCG.

The Coast Guard received a report at 8:42 p.m. that the Neptune had struck an object and had a 1-foot gash on its side.

All the passengers were taken onto rescue boats and brought to Pier 39 in San Francisco after Coast Guard and San Francisco police and fire crews responded to the sinking boat.

The damaged boat was towed to a Sausalito boat shop for repairs.

The cause of the incident is under investigation.

There were no reported injuries or pollution problems after the rescue, according to the USCG.