Just before 10 a.m. on a Thursday in August a postal worker was delivering packages on Avenue P in Bensonhurst when three men with a gun and knives forced him back inside his truck.

"He was made to face the rear door of the truck, while the perpetrators cut open packages behind him," said NYPD Detective William Bravo.

Detective William Bravo of the Queens Robbery Squad is heading the investigation. He says the August 10 robbery is unusual because the suspects stole the driver's cell phone, but not the packages.

"The perpetrators also made the statement, 'we're looking for drugs,'" said Detective Bravo.

Detective Bravo said about an hour after the suspects robbed the truck in Brooklyn, they drove to Laurelton, where they robbed another UPS truck.

"One of the perpetrators put blue tape over his eyes and covered his eyes and stood watch over him while the other two perpetrators also opened packages behind him," said Detective Bravo.

In the second robbery the bandits took 20 packages plus the driver's iphone, cash and credit cards. The suspects then drove to a Lowe's store in Nassau County, where two of them were caught on camera trying to use the stolen credit cards. Detective Bravo thinks they were driving a white, four-door sedan, believed to be a Lexus.

"The best detective is the detective who has information. And the public has more information than anybody. We can't do our job without information from other people," said Detective Bravo.

Anyone with information for police is asked to call crime stoppers at 1-800-577-8477. All calls are anonymous and there is a cash reward for information leading to an arrest and indictment.