The incident happened in Peshawar, the main city of Khyber Pakhtunkhwa province, which has been hit by numerous bomb and gun attacks blamed on Taliban insurgents in recent years. [break]
Police said the blast appeared to have been caused by a bomb but this has yet to be confirmed. Gas fuel cylinders sometimes cause explosions on buses in Pakistan.
"Ten people have been killed and more than 30 wounded, I fear the death toll will increase," Zahirul Islam, deputy commissioner of Peshawar told AFP.
Najeebur Rehman, a senior police official, confirmed the death toll, while hospital officials said at least 47 wounded had been admitted.
Related story
One killed, three injured in Peshawar bomb blast
