President Bush has expressed solidarity with Pakistan, which has been wracked by political turmoil and suicide bombings that killed dozens of people.
From his vacation ranch in Crawford, Texas, Bush called Pakistani Prime Minister Yousuf Raza Gilani.
Separately, Bush called former President Pervez Musharraf, who was forced from power this week. The White House says Bush thanked Musharraf for his efforts in the democratic transition of Pakistan, as well as the fight against al-Qaida and extremist groups.
Aides said Thursday that Bush expressed his sympathies to Gilani for the recent terrorist attacks, and that the president and prime minister reaffirmed their mutual support for going after extremists.