Supporters seeking the release of the imprisoned Imran Khan — the former prime minister of Pakistan — broke through a ring of shipping containers blocking off the capital on Tuesday and battled security forces, despite a government threat to respond with gunfire. Six people have died in the violence.

Thousands of security forces have poured into central Islamabad in an attempt to quell protests in support of Khan that have gripped the capital and its surrounding areas since Sunday. The popular politician has been in jail for months and faces more than 150 criminal cases that his party says are politically motivated.

Authorities say only courts can order the release of Khan, who was ousted in 2022 through a no-confidence vote in Parliament. He has been imprisoned since his first conviction in a graft case in August 2023.

On Tuesday, Pakistan's army took control of D-Chowk, a large square in downtown Islamabad's Red Zone, which houses key government buildings and where visiting Belarusian President Alexander Lukashenko is staying. Paramilitary rangers and police were also out in force and some fired warning shots into the air.

Still, Khan's wife, Bushra Bibi, who is leading the protests, made slow progress toward the square in a heavily guarded convoy, surrounded by well-wishers.

Security forces could use live fire

Interior Minister Mohsin Naqvi threatened that security forces would respond with live fire if protesters fired weapons at them.

"We have now allowed police to take any decision according to the situation," Naqvi said later while visiting the square.

Protester Shahzor Ali said people were on the streets because Khan had called for them to be there.

"We will stay here until Khan is among us. He will decide what do next," Ali said. "If they again fire bullets, the bullet will be responded with the bullet," he said.

Police so far have used tear gas in an attempt to disperse the crowds. The dead include four members of the security services and one civilian; they were killed when a vehicle rammed them on a street overnight into Tuesday.

'Anarchist group' targeting law enforcement: PM

Pakistani Prime Minister Shehbaz Sharif denounced the attack, saying an "anarchist group" was deliberately targeting law enforcement personnel. There was no claim of responsibility for the ramming. A police officer died separately.

Scores of people have also been injured, including journalists attacked by demonstrators. Dozens of Khan supporters beat a videographer covering the protest for The Associated Press and took his camera. He sustained head injuries and was treated in a hospital.

Pakistani media have mostly stopped filming and photographing the rally, instead focusing on the security measures and the city's deserted streets.

By Tuesday afternoon, fresh waves of protesters made their way unopposed to their final destination in the Red Zone. Most demonstrators had the flag of Khan's party, Pakistan Tehreek-e-Insaf, around their shoulders or wore its colours on accessories.

Naqvi said Khan's party rejected a government offer to rally on the outskirts of the city.

Khan's spouse 'wants bloodshed': minister

Information Minister Atta Tarar warned there would be a severe government reaction to the violence. He said the government did not want Bibi to achieve her goal of freeing Khan. "She wants bodies falling to the ground. She wants bloodshed," he said.

In a bid to foil the unrest, police have arrested more than 4,000 Khan supporters since Friday and suspended mobile and internet services in some parts of the country and messaging platforms were also experiencing severe disruption in the capital.

Khan's party relies heavily on social media to demand his release and uses messaging platforms such as WhatsApp to share information, including details of events. The X platform, which is banned in Pakistan, is no longer accessible, even with a VPN.

On Thursday, a court prohibited rallies in the capital and Naqvi said anyone violating the ban would be arrested. Travel between Islamabad and other cities has become nearly impossible because of shipping containers blocking the roads. All educational institutions remain closed.