A knife-wielding robber stole a woman’s cash and cellphone outside a Chase Bank branch in Riverhead on Friday evening, town police said.

The incident occurred shortly after 6 p.m. in the Chase Bank parking lot at 7 Peconic Ave., police said in a statement.

Police said a 63-year-old woman told them she went into the bank and completed a transaction, and upon returning to her vehicle, she was accosted by a man who was holding a knife and demanded her pocketbook. Police said the woman gave the thief her pocketbook which had cash and her cellphone before he fled westbound through the parking lot.

Anyone with information is asked to call Riverhead Town police at 631-727-4500.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra, Michael Sicoli and Tess Ferguson recap the the state championships in baseball, boys and girls lacrosse, plus Jared Valuzzi has the plays of the week. Credit: Newsday/John Paraskevas, Thomas A. Ferrara

Sarra Sounds Off, Ep. 38: State champions On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra, Michael Sicoli and Tess Ferguson recap the the state championships in baseball, boys and girls lacrosse, plus Jared Valuzzi has the plays of the week.

On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra, Michael Sicoli and Tess Ferguson recap the the state championships in baseball, boys and girls lacrosse, plus Jared Valuzzi has the plays of the week. Credit: Newsday/John Paraskevas, Thomas A. Ferrara

Sarra Sounds Off, Ep. 38: State champions On the latest episode of "Sarra Sounds Off," Newsday's Gregg Sarra, Michael Sicoli and Tess Ferguson recap the the state championships in baseball, boys and girls lacrosse, plus Jared Valuzzi has the plays of the week.

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