A man accused of killing two former co-workers at a rental car agency was looking for revenge for losing his job as a car cleaner earlier in the week, witnesses say.

Lazaro Enriqui Martinez, 30, who had worked for three years at the Alamo Rent A Car agency near the Miami International Airport, was to be arraigned Sunday on first-degree murder charges, a Metro-Dade County police spokesman said Saturday.Witnesses said Martinez was fired Wednesday for fighting with other employees and went to the agency Friday in a taxi cab. Yellow Cab dispatcher Tommy Duenas said the cab driver reported that Martinez got out of the car saying "I'm going to get these people for firing me."