Pakistan’s prime minister said on Saturday that authorities would go after those involved in violent protests following the detention of his predecessor, Imran Khan, including prosecution in anti-terrorism courts. Shahbaz Sharif’s warnings were a sign of further escalation in the long-running showdown between the government and Khan.

Khan returned to his home in the eastern city of Lahore early on Saturday, after a court agreed to shield him from renewed arrest for two weeks. The 70-year-old former cricket star delivered a speech from his home later.