HONG KONG (AP) — Hong Kong's leader has claimed that "external forces" are participating in student-led pro-democracy protests that have occupied parts of this financial capital for more than three weeks, but provided no evidence to back his accusation. Chief Executive Leung Chun-ying's statement in a televised interview Sunday was the first time he has alleged foreign involvement in the unrest, echoing accusations by China's central government, which also has not backed them with any evidence.