A federal agent was gunned down outside a Pembroke Pines post office Tuesday, and dozens of police officers are searching for the the shooter.

The U.S. Customs and Border Protection special agent was killed after he got into an argument in the parking lot, police spokesman Brian Davis said. The other man then pulled out a gun and fired at least one shot.

Davis said the suspect drove off in a car and police were combing the area for him.

"We're just going to saturate the area," Davis said.

The victim, who was not identified, was reportedly with his daughter when the shooting occurred.

Investigators were interviewing postal employees and customers in the parking lot.

The suspect is a white male, possibly hispanic, 45-55 years old with a full head of gray hair and wearing a green plaid short-sleeve shirt. They are also looking for a grey/green late model 4-door Chrysler.

The FBI also sent a team because the man was a federal agent, said bureau spokeswoman Judy Orihuela.

South Florida has recently been the scene of several other fatal shootings of law enforcement officers, including the still unsolved killing nearly a year ago of Broward County sheriff's Sgt. Chris Reyka. A rally is scheduled later this week to call attention to Reyka's case.

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The Associated Press contributed to this report.