Recalling that she pressed Pakistan to “squeeze” the Haqqani network when she visited Islamabad last October, Clinton told reporters in Brasilia that she will “continue to make that point, press it hard.”

She added that “there are already indications of Haqqani involvement” in the weekend attacks on Kabul and elsewhere in Afghanistan, adding that the “Haqqani network is a very determined foe.”

Clinton recalled that she had told Foreign Minister Hina Rabbani Khar in a telephone call from Brazil on Monday that she “expressed my strong conviction that there has to be concerted effort” in fighting extremism.

She said such effort must involves the Nato-led force in Afghanistan, Afghanistan and Pakistan. AFP