STORY: Hospital officials said at least 147 people were wounded, with many of them in critical condition.
Prime Minister Shebaz Sharif called the blast a suicide attack. There were at least 260 people in the mosque, police official Sikandar Khan added.
No one has claimed responsibility for the bombing, which ripped through the mosque during noon prayers, causing a wall to collapse on top of worshippers. The building is located inside a highly fortified compound that includes the headquarters of the provincial police force and a counter-terrorism department.