Rosie O’Donnell is “very frightened and concerned” about her 17-year-old daughter Chelsea after she was found with an alleged heroin dealer she met on Tinder.

Chelsea, who suffers from mental illness and had not been taking her medication, was missing for a week before she was found in New Jersey on Tuesday at the home of Steve Sheerer, who was arrested in 2012 for possessing heroin with intent to distribute and child endangerment.

A source told Page Six that Chelsea was found at the Barnegat Township, New Jersey, home of Sheerer after meeting him on Tinder, “She is 17 and he is an [alleged] drug dealer, they met online, on Tinder. Chelsea is mentally ill, it is a parent’s worst nightmare.

“Rosie is relieved that Chelsea is back but is frightened for her daughter, she is extremely upset that Chelsea was with this guy. He’s 25, a heroin dealer who lives with his mother.”

A rep for O’Donnell told us, “Rosie is relieved to have Chelsea back safely but is obviously very concerned about her well-being.”

Mailonline reported that Sheerer, who it says has been convicted of drug offenses, first told police officers that Chelsea was not at his home. But they refused to believe him and found Chelsea huddled in the attic with her therapy dog Bear.

The police officer who found Chelsea by tracking her through her burner phone, said he had no evidence that Sheerer and Chelsea had any sexual contact or that any crime had been committed.

Patrolman Nicholas Dapuzzo said, “I wouldn’t say he was a boyfriend, more of an acquaintance. She stayed there a few nights and she had stayed elsewhere, but she wouldn’t tell me where.

“I couldn’t say they were sexually involved. But they met through Tinder sometime in July.” He added that while Chelsea stated she didn’t want to go home, she said “she was fine.”

Perhaps as a warning to other parents, O’Donnell on Wednesday tweeted a story from a New Jersey news outlet about Sheerer’s 2012 arrest when he was stopped in a car with a woman who had heroin on her, while her children aged one and three were in the back seat. Sheerer’s home was searched and police found heroin, marijuana and drug paraphernalia, according to the report.

This article originally appeared in the New York Post.