The blast occurred at an Imambargah located near the Qissa Khwani Bazaar area of Peshawar when the worshippers were offering Friday prayers.
A Pakistani court on Thursday rejected an appeal against the formation of a special court to try former military ruler Pervez Musharraf on a charge of high treason.
Pervez Musharraf's legal woes mounted on Friday as a Pakistani special court conducting his treason trial issued a bailable arrest warrant for the beleaguered former dictator and ordered his production on February 7.
Former Pakistani military ruler Pervez Musharraf's treason trial was adjourned on Tuesday till January 1 by a special court in Islamabad after he failed to appear before it citing security threats following the recovery of explosives on his pre-scheduled route.
Pakistan's embattled former military dictator Pervez Musharraf has refused to leave the country on "medical grounds" until he is given "clean chit" in high treason and other cases, according to a close aide.