PTI spokesman Fawad Chaudhry said that they have the required numbers to form government.
Counting has begun for the election which will be the second democratic transition of power in the nation's 70-year history.
Extensive firing continues in the area and heavy contingents of elite force have been deployed.
Pakistan's powerful army chief has stepped in to mediate between the embattled government and the protesters seeking resignation of Prime Minister Nawaz Sharif, bringing the military back into the centre stage and signaling a possible end to the high-political drama.
Two Taliban suicide bombers struck a historic church in Peshawar Sunday, killing at least 78 people, including women and children, in the deadliest attack on the minority Christian community in Pakistan's history.
A single party will need at least 137 of the directly elected seats to be able to form the government on its own.
A grieving Pakistan's policy shift towards the Taliban has comes at a great cost, says Shahzad Raza.
'The creation of Pakistan was integral to Britain's grand strategy.' 'If they were to ever leave India, Britain's military planners had made it clear that they needed to retain a foothold in the NWFP and Baluchistan because that would provide the means to retain control of Iran, Iraq, Kuwait, the UAE, Bahrain and Qatar.'
Two suicide bombers rammed into the All Saints Church in the Kohati Gate area of Peshawar, Pakistan, when Prime Minister Nawaz Sharif was on his way to New York to attend the United Nations General Assembly session.