BEIJING (AP) — Escalating efforts to repatriate one of the ruling Communist Party's most wanted exiles, Chinese police have opened an investigation on a new allegation, rape, against New York-based billionaire Guo Wengui, who has been releasing what he calls official secrets ahead of a pivotal party leadership conference.

Two Chinese officials with direct knowledge of the investigation told The Associated Press that police are requesting a second Interpol arrest notice for Guo, 50, for the alleged sexual assault of a 28-year-old former personal assistant.

Guo and his representatives did not re...