Pakistani security forces launched an operation Tuesday night to disperse supporters of imprisoned former prime minister Imran Khan who had gathered in the capital to demand his release from prison.

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