Chief of Army Staff General Raheel Sharif called on Prime Minister Nawaz Sharif in Islamabad Friday and discussed various matters of national security.

According to a private television channel, the two high-ups discussed issues of missing persons, the closure of NATO supply line through Pakistan and the border security situation, besides consultation over matters of national importance.

The meeting came days after the United States warned Pakistan that coalition support reimbursements and security assistance could be held up if land routes remained closed for movement of US and Nato cargo to and from Afghanistan.

The warning came in US Secretary of Defence Chuck Hagel's Monday visit to Pakistan during which he met Prime Minister Sharif and the COAS.

Hagel's trip, which is also the first by an American defence secretary to Pakistan in four years, followed US decision to suspend the use of land routes through Pakistani territory in the wake of Pakistan Tehrik-i-Insaaf's protests against drone attacks.

During the visit, Hagel urged Pakistan to continue fighting terrorists in the country's tribal areas bordering Afghanistan.