NORWALK (AP) — A father and his two young children were found dead Monday in a garage in Connecticut in what appeared to be a murder-suicide, police said.

Norwalk police said they responded to a home shortly after 7:30 a.m. after someone called 911 but hung up. The bodies were found in a detached garage behind a multi-family home in the city's South Norwalk section.

The victims were identified as Gessell Moncada, 5, her 4-year-old brother Jesus Moncada and their father, 27-year-old Yimi Moncada, all of Norwalk.

Police did not release details of how they died.

Investigators told Hearst Connecticut Media that a concerned relative called police to report the children had not returned on time from a weekend with their father.

“I can’t get into any of the specifics because the investigation is still ongoing," Lt. Thomas Mattera said. “What I can say is that this was a very traumatic incident and we are doing all we can to help the family.”