Dallas police say five family members have been arrested after a teenage girl said she was raped and impregnated by a relative three years ago and beaten to induce an abortion.

Four relatives have been arrested on charges of engaging in organized criminal activity and police said at a news conference Wednesday a fifth has been arrested on a charge of aggravated sexual assault of a child.

Police say the girl was 14 in August 2012, and was beaten in early 2013. She's 16 now.

An affidavit says the hours-long beating wasn't reported until May 22 when a woman who said she witnessed the assault took the girl to police.

The affidavit said the baby was stillborn a couple hours after the beating. Police are searching for the remains.