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PITTSBURGH (KDKA) — A Washington County man is behind bars, accused of soliciting sex and child pornography from three underage girls over Facebook. The investigation is far from over, as police are learning of more potential victims.

“Dangerous” is how North Strabane Police are characterizing 19-year-old David Kelley.

In going through evidence online, they have already discovered six more children they believe are also victims and said it’s possible there could be more out there.

“This guy’s dangerous. He really is,” said Chief Brian Hughes, of the North Strabane Police Department.

david kelley This Guys Dangerous: Man Arrested For Sending Sexually Explicit Photos, Messages To Minors

(Photo Credit: Washington County Jail)

Kelley was already wanted for allegedly violating his probation, when police arrested him at his home on South Street in Centerville. He is accused of having unlawful contact — online and by cell phone — with three underage girls, ages 11, 12, and 16.

“We have another six children that this person’s been in contact with,” said Chief Hughes.

It’s possible there could be more.

“We have thousands and thousands of pages from Facebook that we still have to go through,” said Chief Hughes.

According to police, Kelley admitted to having difficulty controlling his sexual urges.

“He exchanged pictures of himself too,” said Chief Hughes.

So far, police said there is no evidence Kelley had any physical sexual contact with the children. Detectives said he was soliciting sex and child pornography.

“He has some other mental, emotional issues too. In my opinion, it makes it dangerous that this could spill out from the internet into real life,” said Chief Hughes.

Police said Kelley also threatened to hurt one of the girls if she went to police.

“That caused us to speed up our search warrants and to get all the info we needed to arrest him because we felt that there may have been some physical harm that was going to be committed,” said Chief Hughes.

Kelley is in the Washington County Prison, being held on $50,000 bond. His preliminary hearing is scheduled for Nov. 20.