The officials, who remain neutral in the conflict that has splintered the country, say dozens are wounded in the blast Thursday.
They say the suicide bomber placed an explosive device in his shoe, causing an initial explosion. As worshippers rushed to the door, he detonated himself in the middle of the crowd.
Eid al-Adha is a major Muslim holiday also known as the feast of sacrifice.
At least 56 killed in suicide bombing at Shi'ite mosque in Paki...