One killed, dozens injured in clashes during Pakistan protests

At least one police officer was killed and dozens of people injured in Pakistan as supporters of jailed former Prime Minister Imran Khan clashed with security forces outside the capital Islamabad on Monday, officials and Khan's party said.

Authorities have enforced a security lockdown for the last two days after Khan called for a march on parliament for a sit-in demonstration to demand his release, while highways into the city have been barricaded.

One police officer was shot and killed, at least 119 others were injured, and 22 police vehicles were torched in clashes just outside Islamabad and elsewhere in the Punjab province, provincial police chief Usman Anwar said. Two officers were in critical condition, he said.

Khan's party said scores of its workers were also hurt.

It said the jailed leader's third wife, Bushra Bibi, and a key aide, Ali Amin Gandapur, who is the chief minister of Khyber Pakhtunkhwa province, were leading a march that arrived almost inside Islamabad on Monday night.

The government has used shipping containers to block major roads and streets in Islamabad, with patrols of police and paramilitary personnel in riot gear.

Officials and witnesses said all public transport between cities and terminals had also been shut down in the eastern province to keep away the protesters,

Provincial Information Minister Uzma Bukhari said about 80 of Khan's supporters had been arrested.

Defence Minister Khawaja Muhammad Asif told local Geo News TV that the government sought talks with leaders of Khan's Pakistan Tehreek-e Insaf (PTI) party to calm the situation. "It was a sincere attempt I must say but it didn't yield any results," he said.

Interior Minister Mohsin Naqvi said security forces showed "extreme restraint" in confronting the protesters, some of whom he said had fired live rounds, while police only used rubber bullets and fired teargas canisters.

"It is easy to respond a bullet with a bullet," he said.

He said the government had offered Khan's party permission to hold a sit-in protest at an open field on Islamabad's outskirts, adding the party's leaders took this offer to Khan at his prison cell, but, "we haven't yet heard back on it."

Naqvi added the protesters would not be allowed to reach outside parliament, warning the government will be forced to use "extreme" steps if they did not budge, which could include imposing curfew or calling in army troops.

"We will not let them cross our red lines," he said

But Khan's party accused the government of using excessive violence to block the protesters and said hundreds of workers and leaders had been arrested.

"They are even firing live bullets," one of Khan's aides, Shaukat Yousafzai, told Geo News.

Reuters TV and local TV footage showed police firing teargas canisters at Khan's supporters, who were pelting them with stones and bricks.

The videos showed vehicles and trees ablaze along the main march just outside Islamabad as the protesters at some places pushed shipment containers to make their way.

The capital has bolstered security for Monday's arrival of the president of Belarus, Aleksandr Lukashenko for a three day visit, a Pakistan prime minister office statement said.