A capital on lockdown, internet shutdowns and protesters clashing with police. What’s going on in Pakistan?

CNN —

Thousands of supporters of Pakistan’s jailed former Prime Minister Imran Khan broke through barricades around the capital Tuesday and marched into Islamabad, clashing with security forces and demanding his release.

Authorities have enforced a security lockdown in the country, imposed internet blackouts and barricaded major roads leading into the capital to prevent protesters from entering, after Khan called for his supporters to march on parliament.

Pakistan’s Interior Minister Mohsin Naqvi told reporters that protesters could remain on the outskirts of Islamabad, but threatened extreme measures if they entered the city.

The latest protests came as Islamabad bolstered security for an official visit by Belarus President Aleksandr Lukashenko, who arrived in the capital on Monday for three days of talks with Pakistan Prime Minister Shehbaz Sharif.

Here’s what to know.

What’s happening?

Policemen fire tear gas shells to disperse supporters of Pakistan Tehreek-e-Insaf (PTI) party during a protest to demand the release of former prime minister Imran Khan, in Islamabad on November 26.

A convoy of vehicles carrying protesters set off from the city of Peshawar Sunday as part of a “long march” with the aim of reaching the capital, about 180 kilometers (110 miles) away.

Led by Khan’s wife Bushra Bibi and Ali Amin Gandapur, chief minister in northwest Khyber Pakhtunkhwa province – where Khan’s party remains in power – the protesters planned to hold a sit-in at D-Chowk, a large square near the country’s parliament.

Protesters reached the outskirts of Islamabad Monday, defying a two-day security lockdown and a ban on rallies. Along the way, police fired tear gas to disperse the crowds and blocked roads with shipping