A man and a woman were arrested late Wednesday in connection with multiple homicides in a rural area outside Seattle, Washington, authorities said.

The bodies of six people, who appears to be three generations of one family were found Wednesday at a rural property in Carnation, about 21 miles east of Seattle, Washington.

A boy about age 3, a girl about 6, a woman in their 30s and a man and a woman in their 50s numbered among the victims found at the scene of the crime. Their names were not revealed, but they were “likely three generations” of one family, according to King County sheriff’s Sgt. John Urquhart, the Associated Press reported.

The cause of death was “most likely gunshots” although no autopsies have been done yet, Urquhart said. According to him, they were most likely killed late afternoon or early evening on Christmas Eve.

Their bodies were found in and around the house, a residential property in Carnation, Urquhart said. The house sits among a cluster of residences and is at the end of a long dirt road on the edge of woods.

A call to 911 was made from the house in the early evening on Christmas Eve, but the call interrupted after about 10 seconds, Urquhart said, according to the AP. He also said the bodies were found by a co-worker of one of the victims who had come to the house because one of the victims, who worked for the Postal Service, did not show up to work.

The arrested man and woman were identified as Michele Anderson, 29, and her boyfriend, Joseph McEnroe. They both were booked in the King County Jail late Wednesday for investigation of six counts of homicide.

Investigators have not determined a motive for the crimes yet. According to Urquhart, the two suspects are related to the victims.

The investigation is ongoing, Urquhart said. Sheriff’s Detective Bob Conner said earlier Wednesday that authorities were searching the area around the house for other possible victims, but he assured people living nearby there was no further danger.