The Pakistan’s Punjab government on Tuesday refused to grant permission to former prime minister Nawaz Sharif to extend his stay in London on medical grounds and asked him to either return to the country or face court.

Sharif, 70, left for London in November last for treatment after the Lahore High Court allowed him to go abroad on medical grounds for four weeks. According to Sharif’s physician, the three-time prime minister is suffering from complex multi-vessel coronary artery disease and substantial ischemic and threatened myocardium for which he is due to undergo surgery.