Terrorism charges brought against Pakistan ex-prime minister Imran Khan

Pakistani police have filed terrorism charges against former prime minister Imran Khan (KM Chaudary/AP)

Pakistani police have filed terrorism charges against former prime minister Imran Khan, authorities said, escalating political tensions in the country as the ousted premier holds mass rallies seeking to return to office.

The charges come over a speech Khan gave in Islamabad on Saturday in which he vowed to sue police officers and a female judge and alleged that a close aide had been tortured after his arrest.