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.

Pakistan home ministry said despite the Islamabad high court's ordering PTI to hold a protest at Sangjani, the party “unlawfully” entered the Islamabad Red Zone

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.

At least one policeman was killed and dozens of people injured in Pakistan as supporters of jailed former Prime Minister Imran Khan clashed with security forces outside the capital Islamabad on Monday,

Thousands of Imran Khan supporters marched closer to the capital of Islamabad on Monday demanding his release from prison as authorities braced to prevent the crowd from entering the city.

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