At least four people were killed and 30 others injured on Thursday in a blast near a crowded bus stand in Khyber Pakhtunkhwa province in northwest Pakistan.
The blast took place in Mingora, capital of Swat, where tourists are being encouraged to visit by the government.
Four people were killed and 30 others injured in the blast that took place near a bus stand, officials said
The injured have been shifted to Saidu Group of hospitals, where an emergency has been declared.
All shops and markets shut down following the explosion, for which no group so far claimed responsibility.
Security forces have cordoned off the area.