Anti-government protesters carry sticks as they run to put up a blockade along the road during the Revolution March towards the Prime Minister's house in Islamabad September 1, 2014. Pakistan is preparing to launch a selective crackdown against anti-government protesters trying to bring down the government of Prime Minister Nawaz Sharif, the defense minister said, warning demonstrators against storming government buildings. (Photo by Akhtar Soomro/Reuters)

A supporter of Tahirul Qadri lies on the ground while soldiers block a road leading to the prime minister’s house in Islamabad, on September 1, 2014. (Photo by Zohra Bensemra/Reuters)

Anti-government protesters sleep under a truck with a poster of their leader Tahir ul-Qadri, Sufi cleric and leader of political party Pakistan Awami Tehreek (PAT), as they camp outside the parliament house during the Revolution March in Islamabad September 2, 2014. (Photo by Zohra Bensemra/Reuters)

An anti-government protester waits to receive his breakfast during the Revolution March in Islamabad September 2, 2014. (Photo by Zohra Bensemra/Reuters)

Anti-government protesters pull a rope to remove a container barricade during the Revolution March in Islamabad September 2, 2014. Pakistani protesters pushed closer to the prime minister's house in central Islamabad on Monday in their bid to force his removal and forced national television off the air after clashes turned violent over the weekend. (Photo by Akhtar Soomro/Reuters)

Anti-government protesters stand guard at a checkpoint at the entrance of an area under their control near the prime minister's house during the Revolution March in Islamabad September 2, 2014. (Photo by Zohra Bensemra/Reuters)

Policemen brought to the capital Islamabad as reinforcements listen to their officer during the Revolution March in Islamabad September 2, 2014. (Photo by Faisal Mahmood/Reuters)

Protesters ride past a checkpoint guarded by their supporters at the entrance of an area under their control near the prime minister's house, on September 2, 2014. (Photo by Zohra Bensemra/Reuters)

Anti-government protesters with sticks sit near stones at an intersection along a road during the Revolution March in Islamabad September 2, 2014. Pakistan's parliament threw its weight behind embattled Prime Minister Nawaz Sharif on Tuesday as a deepening crisis over violent protests demanding his resignation prompted fears of an army intervention. (Photo by Akhtar Soomro/Reuters)

Supporters of Pakistani Muslim cleric Tahirul Qadri and opposition politician Imran Khan, clash with police during an anti-government protest in Islamabad, Pakistan, 01 September 2014. Fresh clashes erupted in Pakistan on 01 September when thousands of protesters armed with rocks and sticks marched towards the official residence of Prime Minister Nawaz Sharif to force him to resign, officials said. Around 1,000 protesters stormed the headquarters of state-run television, blocked transmission and held the employees hostage, Defence Minister Khawaja Asif said. Another group of around 3,000 men was clashing with police nearly a kilometer away from Sharif's residence. Asif said the military had been called in to clear the building. (Photo by Sohail Shahzad/EPA)

Pakistani supporters of Canadian cleric Tahir ul Qadri and cricket-turned politician Imran Khan face riot police during an anti-government protest in Islamabad on September 1, 2014. Hundreds of protesters trying to topple Pakistan's government briefly seized the state broadcaster on September 1, intensifying the political crisis gripping the nuclear-armed nation. Deadly clashes since the weekend have raised the spectre of military intervention which gained ground after one disillusioned opposition leader said the protesters were acting according to a plan devised by the army. (Photo by Aamir Qureshi/AFP Photo)

A Pakistani supporter of cleric Tahirul Qadri uses a slingshot to lob a stone toward riot police during a protest in Islamabad, on September 1, 2014. (Photo by Aamir Qureshi/AFP Photo)

A Pakistani supporter of cleric Tahirul Qadri returns a tear-gas shell toward riot police during an anti-government protest in Islamabad, on September 1, 2014. (Photo by Aamir Qureshi/AFP Photo)

Supporters of cricketer-turned-politician Imran Khan and cleric Tahirul Qadri work to topple a cargo container during a protest near the parliament building in Islamabad, on September 2, 2014. Khan and Qadri supporters have been protesting in the capital since August 15 to try to oust Prime Minister Nawaz Sharif, triggering a crisis that has raised the specter of military intervention in a country ruled for half its history by the army. (Photo by Asif Hassan/AFP Photo)

Anti-government protesters run after police personnel during the Revolution March in Islamabad September 1, 2014. (Photo by Zohra Bensemra/Reuters)

Pakistani supporters of Canadian cleric Tahir ul Qadri and cricket-turned politician Imran Khan hold sticks as they enter the headquarters of the state owned Pakistani Television (PTV) building during anti-government protests in Islamabad on September 1, 2014. Hundreds of protesters trying to topple Pakistan's government stormed the state broadcaster on September 1 as fresh clashes with police broke out in Islamabad. (Photo by Aamir Qureshi/AFP Photo)

Pakistani supporters of cricketer-turned politician Imran Khan and Canadian cleric Tahir ul Qadri beat a riot policeman during an anti-government protest in Islamabad on September 1, 2014. Hundreds of protesters trying to topple Pakistan's government briefly seized the state broadcaster on September 1, intensifying the political crisis gripping the nuclear-armed nation. Deadly clashes since the weekend have raised the spectre of military intervention which gained ground after one disillusioned opposition leader said the protesters were acting according to a plan devised by the army. (Photo by Aamir Qureshi/AFP Photo)

Pakistani army soldiers stand alert inside the parliament building during an emergency session in Islamabad, Pakistan, Tuesday, September 2, 2014. Lawmakers met over the political crisis roiling the country as thousands of anti-government protesters remained camped out in front of the parliament building, demanding Prime Minister Nawaz Sharif resign. (Photo by B. K. Bangash/AP Photo)

Pakistani paramilitary troops stand guard during a clash between police and protesters in Islamabad, Pakistan, Monday, September 1, 2014. Anti-government protesters stormed Pakistan's state television building Monday, forcing the channel briefly off the air as they clashed with police and pushed closer to the prime minister's residence. The violence comes as part of the mass demonstrations led by cleric Tahir-ul-Qadri and opposition politician Imran Khan that demand Prime Minister Nawaz Sharif resign. (Photo by Anjum Naveed/AP Photo)

Pakistani protesters gather next to damaged vehicles during clashes with police in Islamabad, on September 1, 2014. (Photo by Anjum Naveed/AP Photo)