A pair of suicide bombers blew themselves up at the main gate of a paramilitary training center in the northwest area of the country. Around 120 people were wounded in the blasts.
A Taliban spokesman suggested the attack was punishment against Pakistani authorities for not stopping the U.S. raid that killed bin Laden on May 2 in Abbottabad.
Tensions also have risen between the U.S. and Islamabad over allegations that some elements of Pakistani security forces had been harboring bin Laden, the Sept. 11 attacks mastermind.
Pakistani officials have denied knowing that bin Laden was living at the compound in Abbottabad, but criticized the U.S. raid ordered by President Barack Obama as a violation of their country's sovereignty.
To counter allegations that Pakistan harbored bin Laden, the officials point out that thousands of Pakistani citizens, and up to 3,000 of its security forces, have died in suicide and other attacks since Sept. 11, 2001, when Islamabad became an ally of the U.S. in taking on Islamist extremists.
The Associated Press contributed to this report.