(CNN) A New York Police Department officer with over six years of service was shot dead in the Bronx early Sunday, authorities said.

Brian Mulkeen, a 33-year-old member of The Bronx Anti-Crime Unit, was investigating gang activity, including recent shootings with two other officers at about 12:30 a.m. Sunday, NYPD said.

The officers got out of their vehicle to question a man, who then fled, and the officers gave chase. As the officers tried to apprehend the suspect, a violent struggle on the ground began, NYPD Chief of Department Terence Monahan said.

In body-worn camera, Mulkeen can be heard yelling "He's reaching for it. He's reaching for it," Monahan said.

Multiple shots were fired and Mulkeen was shot three times. He was pronounced dead at a hospital soon after.

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