SAN RAFAEL (KRON) — Police are investigating a boat that is possibly sinking early Monday morning at the San Rafael Yacht Harbor, according to police.

San Rafael Police received a call around 4:45 a.m. about a possible sinking boat off the 500 block of East Francisco Boulevard near Harbor Street, police said.

It is unknown if anyone is on the boat.

The waters in the area are about 10 feet deep.

The Coast Guard is at the scene investigating.

KRON 4 News is sending a reporter to gather more information.

Stay with us for updates on this breaking news story.