'Trump ready for any steps if Pakistan doesn't mend its ways'

Mattis also warned Pakistan of global "diplomatic isolation" and losing its Non-NATO ally status if it failed to take action against safe havens to terrorists on its soil.

"If our best efforts fail, President Trump is prepared to take whatever steps necessary," Mattis told members of the powerful House Armed Services Committee during a Congressional testimony on South Asia and Afghanistan on Wednesday.

He was asked a series of questions by Congressmen who expressed their frustration on Pakistan not taking actions against terror groups.

Without much elaboration, Mattis said the US has "enormously powerful number of options" if Pakistan does not follow through and be a better promoter of stability in the region.

Meanwhile, the US is concerned about the future of the government in Pakistan and wants to ensure long-term stability in the country,

Secretary of State Rex Tillerson has said as the two countries attempted to repair their ties after a bitter war of words.

Tillerson's comments came after his meeting with Pakistan's Foreign Minister Khawaja Asif, who is visiting the US as part of efforts to rebuild the bilateral ties frayed after President Donald Trump accused Islamabad of sheltering terror groups.

"This is about the importance of Pakistan, and Pakistan s long-term stability as well. We have concerns about the future of Pakistan s government too...we want their government to be stable. We want it to be peaceful," Tillerson said.

"Many of the issues they're struggling with inside Pakistan are American issues," he said without elaborating.