Thousands of opposition protesters have converged on Pakistan's heavily-barricaded capital, demanding the release of jailed former prime minister 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. Here is a look

Pakistani protesters demanding the release of ex-prime minister Imran Khan on Tuesday killed four members of the nation's security forces, the government said, as the crowds defied police and closed in on the capital's centre.