US Defence Secretary Robert Gates has said the United States welcomes Pakistans increased operations against militants in its autonomous tribal areas near the Afghan border, and offers as much assistance as the Pakistanis wants. We are prepared to move ahead with that relationship and cooperation just as fast as they are prepared to accept it, said Robert Gates, reported Voice of America (VOA). Gates, who arrived in Kabul on Tuesday morning, told reporters during his flight that the United States welcomes Pakistans increased operations against militants in its autonomous tribal areas. Gates said the Pakistani government and the military have done more than any US officials would have expected, or believed possible, a year or so ago. Still, US officials want Pakistan to take even more action against the militants, and the secretary said recent attacks might lead to that. The more they get attacked internally, just like this terrible attack in Rawalpindi at the mosque, the more open they may be to additional help from us. But we are prepared to expand that relationship at any pace that they are prepared to accept, he said. Gates said Pakistan is in a 'serious fight with the insurgents and will receive all of the support the United States can give. The key thing to remember about the relationship with Pakistan is, its Pakistans foot on the accelerator, he said. And we are prepared to move ahead with that relationship and cooperation just as fast as they are prepared to accept it. While Pakistan is considered one of the closest American allies in the war on terrorism, Islamabad also is accused of giving anti-US forces a safe haven along its lawless border. The Obama administration has looked for new ways to expand trade and military cooperation while considering widening missile attacks on al-Qaeda targets inside Pakistan.