ISLAMABAD, Feb. 10 (Xinhua) -- A child was killed and four others injured in a bomb blast in Pakistan's northwestern tribal region of Bajaur Agency on Friday, officials said.

An official of the local political administration said a roadside planted bomb hit a pick-up truck in Arang area of sub-district Utmankhel in Bajaur Agency, the country's northwestern tribal region bordering Afghanistan.

The official said the miscreants attacked the children of a local elder's family, who were returning home after attending their tuition class.

Security forces, local police and rescue teams rushed to the site and shifted the body and wounded to the Timergara Hospital.

According to hospital officials, all the injured children were in stable condition and were being treated at the intensive care unit.

Police said around four to five kg of explosives were used in the improvised explosive device and it was detonated with a remote-controlled device.

Security forces cordoned off the area and started a search operation for the perpetrators.

No group has claimed the attack yet. Enditem