A court has issued an arrest warrant for the ruling party veteran poised to replace Pakistan's ousted prime minister, local television stations reported on Thursday, June 21 deepening political uncertainty in the strategic U.S. ally, Reuters said.

Pakistan's president had nominated Makhdoom Shahabuddin as the Pakistan People's Party (PPP) candidate in an apparent bid for continuity ahead of elections due early next year.

Shahabuddin, the textiles minister, filed his nomination papers on Thursday. The ruling coalition has a comfortable majority in parliament, which meets on Friday in an extraordinary session to elect a new prime minister.

In an unexpected twist to Pakistan's latest political saga, an anti-narcotics court issued an arrest warrant for Shahabuddin in connection with a case of violated quota limits for the export of ephedrine while he was health minister.

That case allegedly involved Gilani's son, Ali Musa Gilani, who is accused by anti-narcotics investigators of violating the quotas. Gilani and Shahabuddin have denied any wrongdoing.

It is unclear whether the arrest warrant will undermine Shahabuddin's nomination. The PPP has meanwhile nominated another candidate, former information minister Qamar Zaman Kaira, as a candidate for prime minister as well.

The Supreme Court on Tuesday declared Prime Minister Yusuf Raza Gilani ineligible for office for refusing to re-open corruption cases against President Asif Ali Zardari, triggering a new crisis in nuclear-armed Pakistan.

At the time, a senior aide to Gilani said only parliament could dismiss the prime minister, raising the possibility of a confrontation between the judiciary and government, but by nominating a new man the president has accepted the ruling and backed away from a fight.