Police fire tear gas as thousands supporting former prime minister Khan arrive near Pakistani capital

ISLAMABAD — Pakistani police Monday fired tear gas canisters at supporters of imprisoned former Prime Minister Imran Khan to stop them from entering the capital, where they hoped to stage a sit-in to demand his release, officials said.

The firing of tear gas came shortly after demonstrators — who traveled 93 miles from the restive northwest — began arriving and gathering near Islamabad. They defied a lockdown, previous tear gas and widespread arrests despite a ban on rallies in the city.

The development came a day after the leadership of Khan’s party went ahead with the “long march” even as Belarusian President Alexander Lukashenko arrived for a three-day visit. He was received at an airport near the capital by Prime Minister Shehbaz Sharif on Monday evening.

Authorities said at least one police officer was killed and several officers and demonstrators were injured in clashes. The marchers appeared determined to enter Islamabad, where the lockdown, which has been in place for two days, has disrupted daily life.

The government was in talks with Khan’s party to avoid any further violence, officials said.

Khan, who has been in jail for over a year and faces more than 150 criminal cases, remains popular. His party, Pakistan Tehreek-e-Insaf, or PTI, says the cases are politically motivated.

A convoy of vehicles carrying protesters was expected to enter the capital Monday night. Security officials say they expect between 9,000 and 11,000 demonstrators, while the PTI says the number will be much higher.

Video on social media showed Khan supporters donning gas masks and protective goggles.

Travel between Islamabad and other cities has become nearly impossible. Ambulances and cars were seen turning back from areas along the key Grand Trunk Road highway in Punjab province, where shipping containers were used to block roads.

Video circulating online showed some protesters operating heavy machinery to remove the containers.