|Gen John Nicholson. Photo: File|
"Obviously, there are ways we can reward Pakistan and there are ways we can ensure they are held to account," Mattis said.
"We are going to work with Pakistan and make this work," he added.
Relations between the two countries strained after a tough speech by Trump in August announcing a change in the country’s policy on the region, and only slightly normalized after meetings between top government officials.
The Pakistani military and civilian leadership have denied the presence of terrorist safe havens on its soil on numerous occasions.
"There are no organized bases of any terrorist organizations in the country anymore," said the spokesperson for the Pakistan Army earlier in October.
Foreign Minister Khawaja Asif had also conveyed the same message to US Secretary of State Rex Tillerson during his recent visit to Washington.