Last Updated Apr 27, 2014 10:35 PM EDT
SAN FRANCISCO - Two small airplanes collided in midair over San Pablo Bay on Sunday and one of the aircraft went down in the water, CBS San Francisco reported.
A single-engine Cessna 210 and a single-engine Hawker Sea Fury TMK 20 collided around 4:05 p.m., the Federal Aviation Administration said. Each plane had one person on board.
The Hawker was able to land safely at Eagle's Nest Airport, but the Cesna went down in the bay, the FAA said. San Pablo Bay is a tidal estuary that forms the northern extension of San Francisco Bay.
The Hawker pilot was believed to be uninjured but the pilot of the Cessna was missing.
Four Coast Guard boats and one Coast Guard helicopter were searching for the missing pilot but so far they have only found debris, Coast Guard Petty Officer Loumania Stewart said.
Other agencies were assisting the Coast Guard in the search and rescue operation, Stewart said.
The two pilots knew each other and there was some contact before the accident, Almador County Undersheriff Tim Wegner told CBS News. Both planes had taken off from Half Moon Bay Airport.