King County Sheriff’s deputies say freezing temperatures may have caused a sailboat to sink inside the Harbour Village Marina in Kenmore on Wednesday.

The county’s Marine Rescue division responded to the marina on Wednesday morning to find a sailboat, still tied up to the dock, submerged up to the boom.

“It could have been one of two things: either a through-hole fitting failed, like a propeller shaft, and it could have frozen and cracked,” King County Sheriff’s Deputy Rich Barton said. “It filled out and went straight to the bottom. The sailboat has a fixed keel, which weighs thousands of pounds. Once it starts to get water, it goes pretty quick.”

The a bilge pump failure could also be to blame, Barton said.

When the county responds to a submerged boat, the main objective is to prevent oil or fuel from leaking into the water. Barton said there didn’t appear to be any leaking fluids from the sailboat.

The boat was raised on Thursday, and though there weren’t apparent damages to the hull, the interior is likely a complete loss, Barton said.