Imran Khan's Pakistan Tehreek-i-Insaf party has decided to withdraw its law makers from the National Assembly and all provincial assemblies except Khyber Pakhtunkhwa.

A senior party leader said, it is part of their efforts to force Prime Minister Nawaz Sharif to step down. He said, the resignations will be submitted to the relevant Speakers today.

The party has 34 members in the 342 seat National Assembly, making it the second largest opposition group.

Meanwhile, the 5-day standoff between the Pakistan government and anti-Nawaz Sharif protestors has intensified.

The efforts by the ruling PML-N government to reach out to the protesters have failed.

Pakistan government's offer to discuss all constitutional demands put forth by Imran Khan's party and cleric Tahirul Qadri's Pakistan Awami Tehreek was rejected by the two protesting groups that have paralysed normal life in Islamabad by staging sit-ins.

Imran Khan has threatened to march into the sensitive Red Zone including Parliament and the Prime Minister's House with thousands of supporters toda.