The bomb was planted near the entrance of the mosque in Landi Kotal town of Khyber Agency, officials of the political administration said.
A house near the mosque was damaged by the blast. Soon after the explosion, paramilitary troops cordoned off the area and launched a search operation.
No group has so far claimed responsibility for the attack. In a similar such incident on Saturday, at least six persons were killed and about 30 others were injured when a bomb went off inside a mosque in Peshawar.
In recent weeks, Peshawar and other parts of the northwestern Khyber-Pakhtunkhwa province have witnessed a string of attacks blamed on the Taliban.
Islamabad: A four-year-old girl was on Sunday killed and three others were injured after a remote-controlled bomb exploded near a mosque in the restive Khyber tribal region in northwest Pakistan, officials said.
First Published: Sunday, March 10, 2013, 21:07