Nassau County police said a robbery at a Mobil gas...

Nassau County police said a robbery at a Mobil gas station on Old Country Road in Westbury on Sept. 16, 2015 is believed to be the 15th such armed robbery on Long Island by the same suspect, who police said is seen here in another robbery, since last month. Credit: NCPD

An armed serial robber struck again by hitting an Elmont gas station, the seventh he's held up in the past month, Nassau police said Tuesday.

Detectives say they want the public's help to nab the suspect, who conceals a black, semiautomatic handgun with his T-shirt or a cloth during the robberies.

In his latest robbery, the gunman took off with money from a 76 Gas station on Linden Boulevard in Elmont about 8:45 p.m. Monday, police said.

The man, who appears to be in his 20s, commits the robberies at night, police said. He demands money and then runs away, police said.

He is about 5 feet 8 inches tall, with a medium build, dark complexion and facial hair, police said.

Robbery detectives asked anyone with information to call 516-573-8040 and refer to robbery squad pattern No. 09-2015.

On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday Credit: Newsday

Sarra Sounds Off: Suffolk Hall of Fame Class of 2026 On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday

On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday Credit: Newsday

Sarra Sounds Off: Suffolk Hall of Fame Class of 2026 On the latest episode of "Sarra Sounds Off," the Suffolk Hall of Fame class of 2026, former NFL Quarterback Mike Buck and Jared Valluzzi has the plays of the week. Credit: Newsday

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