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The explosion in a remote area bordering Afghanistan came as people gathered for Friday prayers near the women's entrance of a Shia mosque in the central bazaar, the latest in a series of attacks across Sunni-majority Pakistan this year.
The local political agent, Ikramullah Khan, said the death toll had reached 22, with 70 wounded.
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| Residents gather near a damaged shop in a market after a blast in Parachinar, Pakistan. REUTERS/Stringer |
Sajid Hussain, a parliamentarian from Parachinar, said gunfire preceded the blast, which he described as a suicide attack. The city is located in an area with a large Shia population.
"The attack took place in a busy area and a women's mosque appears to be the target," he said.
The banned Islamist militant group Tehrik-i-Taliban Pakistan (TTP), often referred to as the Pakistani Taliban, said the blast was part of its operation Ghazi, named after a radical Islamist leader killed by Pakistani security forces in 2007.
Following a string of earlier incidents this year, the latest attack adds to fears of an increase in sectarian violence in Pakistan, a nuclear-armed state of some 200 million people.
Last month, more than 80 people were killed and dozens wounded in an attack on a crowded Sufi shrine in southern Pakistan that was claimed by Islamic State.
In January, at least 21 people were killed when an explosion hit a vegetable market in Parachinar, capital of the Kurram tribal region, where Pakistani security forces have battled militant groups for years.
That attack was claimed by the TTP and a branch of another militant group, Lashkar-e-Jhangvi Al Alami.
