Pakistani security forces have been accused of opening fire on supporters of Imran Khan, the jailed former prime minister, who stormed Islamabad this week to demand his release.

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.

Nearly 4,000 people arrested and at least seven people, including a police officer and members of security forces, lost their lives