A charred lorry, empty tear gas shells and posters of former Pakistan Prime Minister Imran Khan - it was all that remained of a massive protest led by Khan’s wife, Bushra Bibi, that had sent the entire capital into lockdown.

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.

Mr Khan’s Pakistan Tehreek-e-Insaf (PTI) said a “massacre” unfolded in Pakistan and the armed forces fired live rounds, killing “hundreds of people” and many injured with gunshot wounds. It did not give a number as to how many were killed.

Thousands of people are in the heart of Pakistan’s capital to demand the release of imprisoned former premier Imran Khan.

Pakistan's capital Islamabad was gripped by violence on Tuesday as protesters demanding the release of former Prime Minister Imran Khan clashed with security forces near the parliament.

Bushra Bibi, who previously avoided the spotlight, has taken centre stage in her husband Imran Khan’s political party during its protest march to Islamabad that have led to deadly clashes with security forces.

Thousands of security forces poured into central Islamabad in an attempt to quell protests in support of Khan that have gripped the capital.