The death toll in a suicide bombing at a political rally held by a religious party rose to 45 on Monday, officials said, an attack compounding fears of unrest ahead of a general election due later in the year.
An official at a state-run rescue agency, Bilal Faizi, said the death toll had risen to 45. Of more than 130 wounded people, 61 were under treatment, said government health adviser Riaz Anwar.
The bomber attacked the gathering of the conservative Jamiat Ulema Islam-Fazl party, which is allied with the government in the Bajaur district on Sunday in the northwest, near the border with Afghanistan.
No group has claimed responsibility.
A police counter-terrorism wing investigating the blast suspected the ISIS terrorist group was behind it, police said in a statement.