A city firefighter from Mastic Beach is in critical condition Thursday after being brutally beaten.

Police say Richard Berkhout, 46, and his wife were walking home from a 9/11 memorial service Monday when they were confronted by three men in a vehicle. According to police, twins, Darrell and Darien Taylor, got out of the car and beat Berkhout until he was unconscious.

Berkhout is in the intensive care unit at Brookhaven Memorial Hospital with a fractured skull and a brain hemorrhage. The Taylor twins, 28, were arrested and charged with assault. Police are still looking for the third suspect. Anyone with information is asked to call Suffolk Crime Stoppers at 1-800-220-TIPS (8477).