CHESTER COUNTY, Pa. (CBS) — A Chester County man was arrested for alleged sexual abuse of multiple children.

Christopher Giuseppe, 33 is accused of molesting three children, all under the age of 10, in the basement of his parents’ home on Ashley Court in Downingtown where he lived.

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According to Chester County District Attorney Tom Hogan, two of the victims were Giuseppe’s own children. The third child was his girlfriend’s daughter that he was looking after.

The alleged abuse started in early 2014.

During a two-year span, Giuseppe allegedly showed pornography to the children, ages 6, 8 and 9 and would then engage in various types of sexual assault with them individually.

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Authorities say some of the assaults took place at another residence on the 500 block of Bondsville Avenue in nearby Caln Township.

“We are concerned that there may be more victims out there,” said Hogan. “Any child exposed to this defendant was at risk.”

Anyone with further information is being asked to call Caln Police Department Sgt. Christine Cusick at 610-383-1821.

Giuseppe is charged with involuntary deviate sexual intercourse, aggravated indecent assault, corruption of minors, incest and other related charges.

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He failed to post bail and remains in Chester County Prison.