A masked man robbed an East Meadow convenience store Sunday at knifepoint, Nassau County police said.

First Squad detectives said a man wearing a black ski mask and flashing a silver knife approached the north-side window of The Barn at 2805 N. Jerusalem Rd. at about 7:19 p.m.

The man demanded money from the clerk, a 26-year-old man, and gave him a plastic bag. The clerk put an unspecified amount of cash in the plastic bag, and the suspect ran westbound on North Jerusalem and then westbound on Oxford Place.

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Police said the suspect was seen getting into an older model two-door black Infiniti G35, which continued westbound on Oxford Place.

Anyone with information can call Crime Stoppers at 800-244-8477. All calls will be kept confidential.