NEW YORK (CBSNewYork) — A group of robbers left a Jackson Heights, Queens jewelry store empty-handed Tuesday, but escaped before police arrived.

Around 7:45 p.m. p.m., multiple suspects entered the jewelry store at 37th Avenue and 74th Street in Queens. They demanded cash and jewelry from the employees inside, police told CBS2.

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One employee set off a silent alarm, which alerted police who were a few blocks away, police said.

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The suspects fled the scene before the officers arrived. They were not able to flee with any proceeds, police said.

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No employees were injured, tied up or held hostage, police said.