POMPANO BEACH (CBSMiami) – Postal workers handed out flyers in Pompano Beach Tuesday morning as the search continued for a masked gunman who robbed a U.S.P.S. letter carrier Monday afternoon.

The robbery happened around 3:00 p.m. Monday at 901 NE 12 Avenue in Pompano Beach.

Police said the letter carrier saw the masked gunman and a short scuffle did ensue.

“He sees this masked individual, again we don’t know if it’s a male or female and they approached him with a gun with a “Scream” mask from the movies demanding the keys,” said U.S. Postal Inspector Ivan Ramirez. “And the fact that they said keys, he just reached into his pocket and gave him the keys.”

But officials believe the vehicle keys the robber took weren’t the actual target.

“At this time, that was not the case,” said Ramirez. “All you got away with, actually, the keys to the vehicle and not the master key. So we don’t have have a master key out there right now.”

Neighbors of the postal carrier were stunned to hear what happened.

“I can’t believe this happened,” said neighbor Sean Green. “It really is a quiet neighborhood.”

The crime of robbing a mail carrier is bumped up to the federal level and a $5,000 reward is being offered for information, arrests and a conviction.

“This is a federal crime. These are federal employees and a mere shove or shoving match, if you will, that is considered a battery or assault at the federal level,” said Ramirez. “Any of these cases are prosecuted at the federal level. I would think twice before anybody out there thinks they are an easy target. They really are not. They come with a heavy load.”

Anyone with information should contact the U.S. Postal Inspection Service tip line at 1-888-876-5322 or you can call Broward County Crime Stoppers at 954-493-TIPS. You can remain anonymous, and you may be eligible for a reward.