US Secretary of State Hilary Clinton Sunday night rang up Prime Minister Syed Yousuf Raza Gilani and discussed with him relations between the two countries, reported a private TV channel. Hillary said her recent tour to Islamabad had helped improve relations between the two countries. She said the visit also facilitated to develop confidence in the bilateral strategic relations. PM Gilani said improvement in the Pak-US ties would give boost to the efforts to root out terrorism. Pak-US relations faced a severe dent after Washingtons unilateral raid in Abbottabad last month in which al-Qaeda chief Osama bin Laden was killed.