Police in Pakistan's northwestern district of Attock fired tear gas as they clashed with supporters of jailed former Prime Minister Imran Khan, who were protesting for his release and marching towards the capital Islamabad.

At least one policeman was killed and dozens on both sides wounded as supporters of jailed former Prime Minister Imran Khan clashed with security forces outside Pakistan's capital Islamabad on Monday,

Pakistan's capital, Islamabad, is under lockdown for a second day as thousands of protesters demanding the release of former prime minister Imran Khan from jail converge on the city. His supporters are also calling for the overturning of election results they say were rigged - a claim disputed by the government.