<p>A powerful bomb blast ripped through a bus in the restive tribal belt of northwest Pakistan today, killing 13 people, including two children, and injuring four others, officials said.<br /><br />The incident occurred in Sepoy village of Orakzai Agency, officials of the local political administration said.<br /><br />The bomb was triggered by remote control while the bus was passing through the area.<br />Seven persons were killed instantly and six more succumbed to their injuries in a nearby hospital.</p>.<p>Two women, a three-year-old girl and an 11-year-old boy were among the dead.<br />The injured were taken to a hospital at Kohat in Khyber- Pakhtunkhwa province and officials described their condition as critical.</p>.<p>No group claimed responsibility for the attack.</p>.<p>Security forces and a local 'lashkar' or anti-Taliban militia launched a search operation after the blast.</p>
<p>A powerful bomb blast ripped through a bus in the restive tribal belt of northwest Pakistan today, killing 13 people, including two children, and injuring four others, officials said.<br /><br />The incident occurred in Sepoy village of Orakzai Agency, officials of the local political administration said.<br /><br />The bomb was triggered by remote control while the bus was passing through the area.<br />Seven persons were killed instantly and six more succumbed to their injuries in a nearby hospital.</p>.<p>Two women, a three-year-old girl and an 11-year-old boy were among the dead.<br />The injured were taken to a hospital at Kohat in Khyber- Pakhtunkhwa province and officials described their condition as critical.</p>.<p>No group claimed responsibility for the attack.</p>.<p>Security forces and a local 'lashkar' or anti-Taliban militia launched a search operation after the blast.</p>