PRESQUE ISLE, Maine (AP) Schools are closed and some businesses are locked down in Presque Isle, Maine, while a suspect is being sought following a shooting.

Presque Isle police on Monday called the shooting an “isolated incident” but Northern Maine Community College and all public schools opted to close for the day. Residents were told to stay indoors.

WAGM-TV reports that a shooting victim was being treated at a hospital Monday. Police say the victim, a man, called 911 at 5:30 a.m. Monday.

The incident comes less than a month after an unsolved double-killing in Castle Hill, about 10 miles from Presque Isle. State police say two people were shot to death on Aug. 13 in a pickup truck, and residents were encouraged to be vigilant.