JERSEY CITY, N.J. (CBS) – A police officer was shot and killed in the line of duty early Sunday morning in Jersey City, New Jersey.

Police responded to an armed robbery at a 24-hour Walgreens at Kennedy Boulevard and Communipaw Avenue just after midnight.

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Officer Melvin Santiago exchanged gunfire with the suspect outside the store. Officer Santiago was shot in the head by the suspect, who used a gun from an armed security guard.

The officer was rushed to the hospital where he later died.

The suspect was shot and killed at the scene.

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Jersey City Mayor Steve Fulop says the city suffered a great loss and that an investigation is now underway.

No other officers or customers were injured during the incident.

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