The bodies of two young girls were discovered stuffed in a pair of suitcases in an Ohio park Monday — after a dog-walker stumbled on one of the luggage pieces and spotted a head inside.

Cleveland authorities said they are still working to ID the tragic girls, who were only described as “juvenile black females’’ — and believed to be the victims of homicide.

“At this time, we don’t know how long the juveniles had been at this location. It was some time,’’ Cleveland Police Chief Dorothy Todd said Tuesday — describing one of the girls as having been between 8-and-a-half and 13 years old and the other ranging from 10 and a half to 14.

There are no current reports of missing children in the area that match the remains, authorities said.

They added that there is “no indication of an ongoing threat to public safety,” according to the local Fox affiliate. It is unclear if the girls were related.

The Cuyahoga County Medical Examiner’s Office will determine their cause of death.

Local Phillip Donaldson said he made the grim discovery around 6 p.m. when his pooch started lingering around a mound of dirt near Saranac Playground.

“It was like a pile of dirt, and she stopped to sniff, and I usually just walk and she catch up with me, and she was taking too long,” he told News5Cleveland.

“So I went back and looked, and it was a suitcase that was half-buried, and I pulled it up and looked in it, and it was a head. Somebody’s head in it,’’ he said.

Donaldson said he immediately alerted cops to the gruesome discovery.

Police later confirmed they had uncovered the girls’ bodies in the wake of the dog walker’s tip off.