A prostitute suffered fractures and internal bleeding Sunday after her alleged pimp beat her until she lost consciousness, police said.

Demarion Keyes, 28, of a Lewers Street address, was charged Wednesday with first-degree assault, sex trafficking and kidnapping.

He was being held at Oahu Community Correctional Center on $500,000 bail.

Police arrested Keyes at the Honolulu Airport at about 4:30 p.m. Monday as he allegedly tried to flee the islands.

The assault began when Keyes forced the woman into a taxicab at Kalakaua and Seaside avenues at about 11:10 p.m. Sunday, a police affidavit filed in Honolulu District Court said.

Keyes took the woman to his home and dragged her into his apartment, telling her she was never going to stop working for him and that he would beat her if she tried to leave, the affidavit said.

Then, for about an hour, Keyes punched, slapped, and choked the woman and struck her with a belt, the affidavit said. The woman told police she lost consciousness during the beating.

When Keyes went into a bedroom, apparently in search of a bat, the woman ran out of the apartment and began screaming for help, the affidavit said. Keyes fled before officers arrived.

The victim’s mother called police the next day, saying Keyes was at the airport, trying to leave the state.

Police notified state deputy sheriffs who detained Keyes.

The victim was treated at Kaiser Moanalua Medical Center for several fractures and internal bleeding. A doctor told police the woman sustained serious bodily injury and faced substantial risk of death, the affidavit said.

The woman told police she was a prostitute and had been working for Keyes for 18 months. She said Keyes beat her because she wanted out of prostitution.