Pakistani security forces have been accused of opening fire on supporters of Imran Khan, the jailed former prime minister, who stormed Islamabad this week to demand his release.

Pakistan police said Wednesday they had arrested nearly 1,000 protesters who marched on the capital demanding the release of jailed ex-prime minister Imran Khan, after crowds were evicted from the city centre in a sweeping security crackdown.

Nearly 4,000 people arrested and at least seven people, including a police officer and members of security forces, lost their lives