Imran Khan supporters clash with cops on way to Islamabad

Thousands of supporters of Imran Khan, Pakistan’s jailed former prime minister, are marching towards the capital Islamabad from across the country, demanding his release.

As of Monday morning, dozens of protesters have clashed with police, pelting stones at officers, who reportedly responded by firing tear gas - with more violence expected later on in the day, BBC reports.

Authorities have put the capital under lockdown, blocking highways and suspending phone services in certain areas in a bid to stop the movement - which first began on Sunday - though protesters do not seem deterred.

Protesters started after Khan had earlier issued a "final call" to his supporters, calling on them to remain in the capital until the government addresses their demands.

He is currently serving a three-year-jail term for corruption - which he denies. Despite his legal troubles, he remains hugely popular in Pakistan.