(FOX NEWS) — A Massachusetts police officer and an elderly woman were killed Sunday after a suspect attacked the officer with a rock, took his gun and shot him in the head and chest, officials said.

Weymouth police officer Michael Chesna, 42, was pronounced dead at a local hospital shortly before 8 a.m. The unidentified woman was fatally wounded by stray bullets in a nearby home. A suspect, identified as Emanuel Lopes, was in custody and was expected to be arraigned on two counts of homicide Monday.

According to investigators, Lopes crashed a car he was driving and fled the scene on foot at approximately 7:30 a.m. Norfolk County Assistant District Attorney Greg Connor said Chesna discovered Lopes vandalizing a nearby house. When the officer drew his gun and commanded Lopes to stop, the suspect allegedly attacked Chesna with the stone and struck him in the head.

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