ISLAMABAD (AP) -- Supporters seeking the release of imprisoned Pakistani former premier Imran Khan on Tuesday broke through a ring of shipping containers locking down the capital Islamabad, while at least six people have died in protest-related violence. Protesters battled security forces and ignored a government threat to respond with gunfire.

The dead included four members of the security services and one civilian who were killed when a vehicle rammed them on a street. Prime Minister Shehbaz Sharif denounced the attack on Tuesday, saying an "anarchist group" was deliberately targeting law enforcement personnel. There were no claims of responsibility for the ramming. A police officer died in a separate incident.

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