NEW YORK - A teenage boy in the US state of New Jersey was in police custody Monday after being accused of gunning down his family on New Year's Eve with a semiautomatic rifle, authorities said.
Police were called to a home in the city of Long Branch, about 55 miles (90 kilometers) south of New York, at 11:43 pm Sunday in response to a report of shots fired and found 4 people dead, Monmouth County Prosecutor Christopher Gramiccioni said in a statement.
The victims were the suspect's father Steven Kologi, 44; mother Linda Kologi, 42; sister Brittany Kologi, 18; and family friend Mary Schultz, 70.
The suspect's brother and grandfather were apparently unharmed. They "thankfully left the home and came out OK," Gramiccioni said at a press conference Monday, according to ABC News.
Prosecutors did not release a motive for the killings, which the boy carried out with a Century Arms semiautomatic rifle, prosecutors said.
The teenager, whose name was not released, was taken into custody without incident.
He was expected to be charged as an adult with 4 counts of murder and one count of possession of a weapon for an unlawful purpose.