At least six people have died in protest-related violence as supporters seeking Imran Khan’s release from prison broke through barriers meant to lock down Islamabad.

Thousands of opposition protesters have converged on Pakistan's heavily-barricaded capital, demanding the release of jailed former prime minister Imran Khan.

Four Pakistani security troops were killed on Tuesday in Islamabad after being run over by vehicles in a convoy of protesters demanding the release of jailed former Prime Minister Imran Khan. The tragic incident occurred as thousands of Khan’s supporters marched on the capital, breaking through barricades to stage a sit-in near parliament.