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ROSEDALE, Queens — A 15-year-old has been arrested for allegedly climbing into a Queens home and sexually assaulting a 4-year-old girl, police said Tuesday.

The young victim was sleeping in her second-floor bedroom on Francis Lewis Boulevard in Rosedale with the window open when someone, possibly using a ladder, accessed her bedroom early Sunday, police said.

Her parents were not home at the time, but she was left in the care of several adult relatives, sources said.

When the child’s parents returned, she told them a stranger accessed her bedroom and assaulted her, according to police.

Sources say there was a 9-month-old in the living room at the time. The infant had been moved to another room.

Doctors later found indications of sexual assault, sources say.

Investigators were able to lift fingerprints from a ladder and inside the house, as well as locate surveillance video, sources tell PIX11.

That led police to a “known” 15-year-old in the neighborhood, according to sources.

He was arrested early Tuesday, and charged with attempted rape, burglary and aggravated sex abuse, police said.

The teen has not been identified.

PIX11’s Myles Miller contributed to this report.