Speaking at Adiala jail – where he has spent most of his time since his arrest in August – Khan accused both the PML-N and the PPP of corruption.
“We will neither sit with the PML-N nor with the PPP,” he told a handful of journalists covering a procedural hearing in a prison outside the capital Islamabad.
There have been widespread allegations of vote rigging and manipulation of the results after authorities shut down the country’s mobile phone network on election day and the count took more than 24 hours.
Holding a prayer rosary in his hand, Khan said, “We are going to challenge the election rigging in the Supreme Court of Pakistan and we will consider the alliance later.”
The remarks are one of the first made by Khan publicly since his PTI party received a boon despite being effectively eliminated in the polls held five days ago.
PPP Chairman Bilawal Bhutto Zardari, who came in third, said on Tuesday that his party was not interested in a new alliance with the PML-N but would support any government formed by them on some issues.
Bhutto Zardari said, “We will support a political party without being part of the government.”
“But we will support the prime minister’s position, the budget and the legislation votes on an issue-by-issue basis,” he said.