Local and state police are reportedly investigating why a father, mother and three children were found dead from apparent gunshot wounds on Sunday afternoon in their Saco, Maine home.

Officials said the parents were in their 30s and the children were ages 4, 7 and 12, reported The Associated Press.

The family was discovered in their unit at RiverView Apartments, located at 27 Water St. Authorities said a gun was recovered close to one of the bodies and that a family member may have been the shooter.

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Stephen McCausland, spokesman for the Maine Department of Public Safety, told The Portland Press Herald that “These are not accidental deaths.”

McCausland said that “There is no one else involved in this from outside the family,” reported The Boston Globe.

Neighbors, who reportedly did not hear any gunshots, said the father worked for the apartment complex in a maintenance role and described him as “friendly and outgoing.”

The AP reported:

‘You’d walk and he’d ask how your day was going. He was really nice,’’ said neighbor Kristi Harkins. She said she had seen the eldest boy playing outside on Saturday.

The bodies were discovered when an employee of the complex entered the apartment after someone expressed concern to the authorities about the family’s whereabouts.

Autopsies of the bodies, which were reportedly found in three separate rooms, are expected to take place on Monday.

WGME’s Lexie O’Connor reported that authorities told her they continue to investigate but that the public is not at risk. Saco Police Chief Brad Paul reportedly described the inside of the home as a “tough scene.”

According to The Press Herald, the RiverView Apartments complex is a building made up of 61 units and located in downtown Saco, a town of 18,000 in southern Maine.

This story is developing and will be updated as more information becomes available.