MILWAUKEE — A Milwaukee police officer was shot and killed early Tuesday while trying to apprehend a robbery suspect, who was also shot and killed after a physical struggle with the officer.

The officer had been chasing after, and exchanged gunfire with, a 19-year-old man, Milwaukee Police Chief Jeffrey Norman said, although it was unclear as of Tuesday evening whether or not his injuries were self-inflicted.

Norman said the officer, later identified as 37-year-old Peter Jerving, had four years of experience. He was part of a group of officers who at 1:16 a.m. responded to a block on the city’s south side to check for a man wanted in connection with a robbery that occurred Monday at 11:25 p.m.

“Milwaukee, our hearts are heavy,” Norman said, at times appearing emotional during a brief press conference near the scene. “One of our finest, who put on that uniform, put on that badge, went into work last night and paid the ultimate sacrifice for protecting our community.

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Chief: Man fled on foot, chase ensued

Norman said “multiple officers” on the city’s northwest side were checking for a robbery suspect about 1:15 a.m. Tuesday.The robbery had been reported at about 11:25 p.m. Monday.

On the south side, officers encountered the 19-year-old man who ignored their orders and ran away, Norman said.

One officer caught up with the man, a struggle ensued and the man fired a handgun, hitting Jerving, who authorities said was running to help.

Jerving was wounded, returned fire and later died from his injuries at the hospital, Norman said.

The information released early Tuesday was preliminary. The investigation is being led by the Brookfield Police Department.