Six people were killed and four wounded when a bomb planted in a donkey cart exploded in a remote town in Khyber Agency on Sunday. A donkey cart carrying sand was left unattended in the market area of Mastak town near the Afghan border, officials said. “The explosives concealed in the sand loaded onto the cart was detonated with the help of a remote controlled device,” local administration official Syed Ahmed Jan told AFP by telephone. Another senior official Mutahir Zaib confirmed the incident and the casualties. He said the injured were out of danger. No group has claimed responsibility. Officials have blamed previous such attacks on Taliban and Islamist militants.