Authorities have reopened roads linking Pakistan’s capital with the rest of the country, ending a four-day lockdown, after using tear gas and firing into the air to disperse supporters of imprisoned former Prime Minister Imran Khan who demanded his release from prison.

The demonstrators want the federal government to resign over what they call rigged general elections this year.

The government blocked most major roads with shipping containers, and police and paramilitary personnel were deployed in riot gear.