"Outspoken cricketer-turned-politician" Khan is seeking to lead Pakistan, having "appealed to the masses, especially the younger generation", with promises of "rooting out corruption" to create a "new Pakistan", says Al Jazeera. The results had been due by around 2 a.m. local time.
"My candidates complaining polling agents have been thrown out of polling stations across the country", he said in a tweet.
Following a bitter contest, police told the Telegraph they feared violence after polling day as well as during voting.
The PML-N, on the other hand, says it is the target of the alleged military machinations, with candidates under pressure and Nawaz Sharif ousted from power past year and jailed over a corruption conviction days before the vote, removing Khan's most unsafe foe from the race.
Nearest rival, the Pakistan Muslim League-Nawaz (PML-N), has won 64 seats. "The delay is being caused because the result transmission system has collapsed", Yaqoob said.
PTI leads in Pak election 2018 results
"Khan as prime minister is unlikely to challenge the army's authority on policies including national security, defence, and relations with India, Afghanistan, and the US", Mr Shailesh Kumar, Asia director at Eurasia Group in NY, said in a report. In all likelihood, the contest seemed to head for a two-party battle between Khan's PTI and the incumbent PML-N of former Prime Minister Nawaz Sharif, whose brother Shehbaz is leading its campaign.
Sharif's Pakistan Muslim League-Nawaz (PML-N) and rival Pakistan Peoples Party (PPP) both said their party monitors in many voting centres were either kicked out during counting or had not received the official notifications of the precinct's results, but instead got hand-written tallies that they could not verify.
At least 37 people were killed and several injured mostly in a suicide bombing in Balochistan on Wednesday as millions of voters thronged polling stations across the country to exercise their franchise in the 11th general election.
If successful, the elections will mark only the second time a civilian government has handed power to another in Pakistan since the country's independence in 1947.
Any government will also compete for influence over foreign policy with Pakistan's powerful military, which has ruled for much of the nation's history and faced accusations of meddling in the campaign - allegations it denied.
Sharif was ousted from power previous year and jailed over a corruption conviction days before the vote, removing Khan's most risky rival.
The uncertainty of the outcome of the vote - no single party appeared assured of a simple majority win - could also lead to prolonged post-election jockeying that would hamper the forming of the next government.
"It is a sheer rigging". In a tweet on his official page, Sharif said "our democratic process has been pushed back by decades", adding that "had the public mandate been delivered in a fair manner, we would have accepted it happily".
Faisal said that the position of any leading party must be accepted in the wake of the election results.
In a separate incident, four people were injured in a blast outside a political camp in Larkana in Sindh province, the home of the Bhutto family.
Senator Mushahid Hussein, a central PML-N leader alleged that the Wednesday's elections were the "dirtiest" in the country's political history.
"My inspiration is our Prophet (PBUH) who believed in a welfare state; where we take responsibility for our weak".
Imran's ex-wife, British heiress Jemima Goldsmith, congratulated her former partner on succeeding after 22 tough years that included "humiliations, hurdles and sacrifices".