CLINTON, Md. – No arrest has been made in the slayings of three girls under the age of 10 who were found in a home in Clinton, a Maryland suburb of Washington, D.C., police said Friday.

An adult family member found the dead children — all with trauma to their bodies — inside the home, and no suspects are in custody, according to Jennifer Donelan, a spokeswoman for the Prince George’s County Police Department.

At a news conference Friday afternoon, officials sought to assure the community that police are working tirelessly to find those responsible.

“So far in investigation, believe it’s confined to this home,” Prince George’s County Deputy Chief Sammy Patel said.

“We are now in the midst of a major investigation into what happened to these children, who killed them,” Donelan said. She called it “one of the most difficult scenes” that the department’s officers have encountered, and said the department will provide counselling services to responding officers.

Donelan said investigators can’t say yet how, or even if, the three girls are related.

Patel said police are interviewing family members.