BROCKTON, Mass. (AP) — Police are investigating Brockton's 11th homicide of the year, and second this month.

Officers responding to an emergency call found the male victim inside a third-floor apartment just before 10 a.m. Sunday suffering from what was apparently a gunshot to the head.

An autopsy is scheduled.

The victim's name was withheld pending notification of family.

There had been no arrests as of Sunday evening.

A spokeswoman for the Plymouth district attorney's office says investigators are trying to determine how long the body was in the apartment.

A man was shot on a city street on Oct. 5.