Anti-government protesters marched towards Pakistan’s parliament in Islamabad on Tuesday night with the aim of forcing the country’s prime minister to resign.<br /><br />Riot police and paramilitaries had tried to seal off the diplomatic designated secure zone before the march started but were ordered not to intervene once the demonstrators arrived.<br /><br />Former cricketer Imran Khan who is head of the country’s third largest political party, and cleric Tahir ul-Qadri are leading the protests.<br /><br />Demonstrators used cuters and cranes to force their way past barricades of shipping containers into the so-called ‘Red Zone”. Now they are there government options are running out. <br /><br />Both Khan and Qadri want Prime Minister Nawaz Sharif to quit accusing him of rigging last year’s election and of being corrupt.