Malek seeks proof of Blackwater's presence

Local newspapers have frequently carried reports about the presence of Blackwater, which drew worldwide condemnation for its dirty tactics in Iraq.

"I will resign if it is proved that Blackwater is present in the country," Malek told reporters.

He, however, acknowledged that DynCorp, a contractor engaged by US forces, had been allowed by the previous government to handle transportation of goods from Pakistan to Afghanistan.

Stating that his ministry was taking steps to sort out the matter, Malek said he had held meetings with security agencies on how to "regularise" the presence of DynCorp and bring it within the ambit of law.

Omar whereabouts

He also rejected a Washington Post report quoting two former intelligence officials that top Afghan Taliban leader Mullah Omar had taken refuge in Karachi.

"If they have information about his whereabouts they should share it with us so that we arrest him," he said, pointing out that a similar baseless claim had earlier been made about the presence of members of the Taliban shura (council) in Quetta, capital of Balochistan province.

Malek also said he had drawn the attention of CIA chief Leon Panetta during the latter's visit to Islamabad earlier this week about the interference in Balochistan from the Afghanistan side.