Maine State Police today continued investigating a weekend killing in which a 23-year-old man was charged in the stabbing death of his older brother.

Enoch Petrucelly was charged Sunday with murder in the death of Michael Petrucelly, 24, at a home of an acquaintance on this Penobscot Bay island. The brothers live in Palmyra and were visiting the island over the weekend.

The cause of death was multiple stab wounds to the chest, a spokewoman for the state medical examiner's office said after an autopsy today.

Officials were called to a Crabtree Point Road residence at about 5:40 a.m. Sunday with a report of an unresponsive man, said Lt. Gary Wright. When officials arrived, the older brother was dead, he said.

Wright said the death was being treated as a "domestic violence homicide." Detectives today continued processing the home and interviewing people on the island and on the mainland, he said.

Police didn't reveal the type of weapon or other details surrounding the death, but Wright said more information could be forthcoming when Petrucelly makes his initial court appearance, which is scheduled for Tuesday morning in Knox County Superior Court. Petrucelly was being held today in the Knox County Jail in Rockland.