Officials in northwestern Pakistan say a bomb blast in a Sunni Muslim mosque has killed at least four people and wounded at least 28 others.
Authorities say the explosion in Peshawar was detonated Saturday during afternoon prayers.
Peshawar, the capital of the Khyber Pakhtoonkhwa province, is vulnerable to attacks as it is surrounded by the lawless tribal regions where al-Qaida and Pakistani Taliban have hideouts.
Some information for this report was provided by AP and AFP.