Two planes collided Sunday afternoon in Northern California and one pilot is still missing.

Two single engine planes, one Cessna 210 and one Hawker Sea Fury TMK 20, were involved in the crash according to Federal Aviation Administration spokesman Ian Gregor.

The Cessna ended up in the San Francisco Bay while the Sea Fury landed safely at the same small airport in Ione, Calif., which is where it took off from. The two pilots of the Sea Fury, a husband and wife, did not require medical attention.

Monday, search teams were unable to find any signs of the Cessna's pilot, but the Coast Guard intends to keep the search going. In total, nine boats and two helicopters were involved in the search for the only individual on the Cessna, the pilot.

Both planes were involved in the Pacific Coast Dream Machines festival. The festival features planes, motorcycles and cars and is located at Half Moon Bay Airport, about 20 miles south of San Francisco. The two planes were returning to Ione.

"Everyone associated with the Pacific Coast Dream Machines Show is terribly saddened by this news, and we hope and pray the missing plane and survivors are found," the event organizers said in a statement.

Witnesses at Point San Pablo Yacht Harbor saw the Cessna spiraling out of control and crashing into the choppy water, according to the San Francisco Chronicle.

"Tragic. The plane spinning that hard. You can't jump out. You can't get away. It's really sad," witness Eric Johnson told KTVU.

Broken parts of the 50-year-old Cessna were found in the water after the Cessna crashed.

The Sea Fury was damaged in the collision, but county Undersheriff Jim Wegner would not comment on the extent of the damage. Like the Cessna, the Sea Fury is a vintage plane that was restored for the festival.