Authorities are searching for three people who were aboard a private twin-engine plane that crashed off the central California coast.

Emergency officials responded Saturday night after receiving a lost radar alert and 911 calls from residents, KSBW-TV reported. Witnesses reported hearing an aircraft engine revving and a splash in the water near the coast of Pacific Grove, the station reported.

The small plane, a Beech 95-B55 Baron, took off from the San Carlos airport at 10:11 p.m. local time and was last seen at 10:37 p.m. near Monterrey, according to flight tracking data from FlightAware.com.