Amid differences with America on the issue of drone attacks against high-value terrorist targets on it soil, Pakistan said it would not give any ‘blank cheques’ to the US and not accept foreign troops in its territory in the ongoing war to root out al-Qaeda and Taliban.

Islamabad has flagged ‘certain red lines’ that cannot be crossed by US, Foreign Minister Shah Mahmood Qureshi told a news conference after a meeting with America's Special Envoy Richard Holbrooke and top military commander Admiral Mike Mullen, where he complained about US missile strikes.

"The bottom line is the question of trust. We are partners and we want to be partners. We can only work together if we respect and trust each other. There is no other way.

Nothing else will work," he said.

Pakistan has made it clear that it would not accept any "foreign boots on Pakistani soil" and this has been accepted by Washington, he said.

Qureshi said Pakistan had differences with the US on the issue of missile strikes by American drones in its tribal areas. He said Pakistan considered the attacks counter-productive and working to the advantage of extremists.

Both sides had "agreed to disagree" on the issue, which would be discussed during a meeting of civil and military leaders of Pakistan, Afghanistan and the US to be held in Washington during May 5-7, he said.