Nassau police said they are investigating an armed robbery at a T-Mobile store Thursday night in Massapequa Park. 

According to Robbery Squad detectives, an unknown male entered the T-Mobile at 4732 Sunrise Hwy., displayed a handgun, ordered two employees to the floor, then stole an undisclosed number of cellphones.

The robber fled on foot, police said, and no injuries were reported. The robbery happened at about 7:20 p.m.

The robber was described as a male in his late 20s, 6 feet to 6 feet, 2 inches tall, with an average build.  He was wearing a long, green jacket and a dark mask.

Detectives request anyone with information regarding the robbery to call Nassau County Crime Stoppers at 800-244-TIPS.  All callers will remain anonymous.

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Wild weather on LI ... Deported LI bagel store manager speaks out ... Top holiday movies to see ... Visiting one of LI's best pizzerias ... Get the latest news and more great videos at NewsdayTV

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