ISLAMABAD: Opposition parties in Pakistan have called on the Supreme Court to remove Prime Minister Nawaz Sharif from office after an investigation found that he and his family possess wealth exceeding their known sources of income.

The investigation is linked to the mass leak of documents from a Panama-based law firm in 2016, which revealed that Sharif and his family have offshore accounts.

Naeem Bukhari, a lawyer for opposition leader Imran Khan, submitted the request to the court on Monday. The court has the constitutional power to disqualify someone from serving as prime minister, and is expected to rule in the coming weeks.

The Sharifs have denied any wrongdoing. Their attorney, Khawaja Haris, argued Monday that the probe was flawed.

The court is expected to either put Sharif on trial on corruption charges, or even disqualify him, but few expect the judges to dismiss the case after the panel tabled a damaging 254-page report into his family wealth.

Sharif has denied any wrongdoing after the report alleged his family's vast wealth was beyond their means, and accused his children, including presumed heir Maryam, of signing forged documents to obscure ownership of posh London flats.

Sharif, 67, has rejected demands by opposition parties to resign, warning his ouster would destabilise the country and imperil hard-won economic gains since his poll victory in 2013.

"It hurts that despite of our hard work, attempts are afoot once again to push the country back," Sharif told a meeting of his ruling PML-N parliamentary party over the weekend.

Sharif has talked of a conspiracy against him, but has not named anyone.

The court will resume hearing the case Tuesday.