Civil unrest in Pakistan. Protesters here are stopping at nothing in their fight to see Pakistan's premier quit.

Riot police fire rubber bullets and tear gas at demonstrators in Islamabad, injuring dozens.

The protesters were attacking the home of Prime Minister Nawaz Sharif in an attempt to stage a sit-in.

The protesters are being led by opposition leaders Imran Khan and Tahir ul-Qadri, who say they won't back down unless the Prime Minister resigns.

But Sharif has said he will not step down.

The protests highlight the delicate state of democracy in the country.

Sharif came to power in the country's first democratic transition over a year ago, in a country that has long fluctuated between civilian and military rule.