Out of 272 seats, elections were held in 270 constituencies as two seats remained uncontested due to multiple reasons.
Both the PML-N and PPP say their party monitors at many voting centres were either kicked out during counting or had not received the official notifications of the precincts' results, instead being given handwritten tallies they could not verify.
"The worst kind of irregularities have been committed which are unprecedented", said Mr Sharif of the election.
Rival parties met last night as part of an alliance called the All Parties Conference where they called out the military for interfering in the polls.
India on Saturday said it desired a prosperous and progressive Pakistan, and hoped that the new government in Islamabad will work constructively to build a safe, stable and secure South Asia free of terror and violence, in its first reaction on elections in that country.
The country was under direct military rule for more than half its 71-year existence, and the army still retains huge power and influence.More news: Mahrez admits: I chose Man City over other clubs
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Supporters of Imran Khan, chairman of the Pakistan Tehreek-e-Insaf political party, celebrate near his residence in Bani Gala during the general election, in Islamabad, Pakistan July 25, 2018.
In an interview, he said that more members of Punjab Assembly will join PTI and with the inclusion of these members, the party will achieve the required total to form government in Punjab province. As per the law, the President of Pakistan should convene the maiden NA session within 21 days of election to give oaths to lawmakers and elect the new speaker.
According to Dawn, the Tehreek-e-Insaf's government of Imran Khan will immediately have to approach the IMF for what would be the country's 13th bailout from the fund.
When contacted, the PTI's Shafqat Mehmood claimed that no formal meeting had taken place in Banigala and that they (PTI leaders) had a general discussion on the challenges the party could face after formation of the government, but no names of federal ministers or chief ministers were discussed. He'll need the Pakistan Peoples' Party's help.
"We aspire to a regional order - independent nations that can defend their people and compete fairly in the global marketplace", Pompeo said during a speech on the Indo-Pacific region. "We want a balanced relation with the US".
But he has already created unease by pandering to Islamists during the campaign, and such a coalition could fuel fears his government will cater to the religious right.