Pakistan is facing a massive law and order breakdown after thousands of protestors, supporters of Imran Khan, stormed into the national capital, Islamabad.

Authorities have reopened roads linking Pakistan’s capital with the rest of the country, ending a four-day lockdown, after using tear gas and firing into the air to disperse supporters of imprisoned former Prime Minister Imran Khan who demanded his release from prison.

The crackdown brought a swift end to the protests that have gripped Islamabad, Pakistan’s capital, this week ever since thousands of people gathered in the city to demand the release of Imran Khan, the former prime minister. Mr. Khan has been in prison since last August on charges that his party claims are politically motivated.

Thousands of demonstrators supporting former Pakistani Prime Minister Imran Khan broke through barricades around Islamabad on Tuesday, killing four security service members and moving toward the center of the city.

Thousands of supporters of Pakistan's jailed former Prime Minister Imran Khan marched on the capital Islamabad this week, breaking through barricades and clashing with police in response to his call for a sit-in protest.