US has raised pressure on Pakistan to tackle the Haqqani network, a branch of Afghan Taliban which operates across the Af-Pak border and is widely suspected of having close ties to the country's intelligence agency ISI.
Fearing at the possibility of attacks against the US emanating from Pakistan, Secretary of State Hillary Clinton on her second visit to the country has called on Islamabad to take further and specific actions against militant networks, BBC reported.
Without going into details, BBC said that Clinton in an interview in American Embassy compound in Islamabad had indicated that US wanted Pakistan to do more to tackle the Haqqani network.
She also said that the US State Department was looking into the possibility of listing the Haqqani network as a terrorist organisation.
Describing the Haqqani network as "violent and feared", BBC said, the organisation operates along the Pak-Afghan border and is seen as a main threat to US and NATO troops in Afghanistan.
"We have designated a number of their leaders over the year as terrorists, and we're now looking at whether and how to describe the group and if it meets the legal criteria for naming it", she said.
Clinton is the second major American leader to have called for listing of Haqqani network as a terrorist organisation. The idea was first mooted by Senator Carl Levin, Chairman of the Senate Armed Services Committee.