ISLAMABAD, Nov. 24 (Xinhua) -- Casualties are feared following an explosion on Monday morning near the headquarters of the Federal Constabulary in Peshawar, the provincial capital of northwest Pakistan's Khyber Pakhtunkhwa, police said.

Capital City Police Office Mian Saeed told the media that the number of casualties was not known yet, adding that initial investigation showed that it was a suicide attack. ■