Updated at 4:01 p.m.

MATAWAN, NJ — An off-duty Roselle Park police officer shot himself in the head after being involved in a crash in Matawan Sunday afternoon, authorities said.

While authorities were investigating the crash, Officer Edward Nortrup removed a gun and fired one shot killing himself on scene, Roselle Park Police Chief Daniel J. McCaffery said.

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“We are grieving as a department for the loss of our officer,” McCaffery said.

The Monmouth County Prosecutor’s Office is investigating, authorities said.