A bomb targeting a passenger train in southern Pakistan has killed at least seven people and wounded more than 30, the latest in a series of attacks.
The bomb went off near Unar station, 450 kilometres northwest of Karachi, on Sunday and badly damaged several carriages.
"The death toll in the explosion rose to seven after two injured persons died of their wounds in a hospital in Jacobabad town," a senior local administration official, Sardar Jamali, told AFP.
He said the Khushhal Khan Khattak express was travelling to Peshawar from Karachi when it was hit by the blast, which injured more than 30 people and damaged hundreds of metres of track.
Pakistan has endured a bloody start to the year with 114 people killed in January alone.
On January 29 Prime Minister Nawaz Sharif announced talks with the Pakistani Taliban to "give peace another chance" but some 60 more people have died in Islamist-linked violence since.
Three carriages were derailed on Sunday and two of them were severely damaged by the force of the explosion.
A senior railways official, Sikandar Lashari, confirmed the toll of the bombing, for which there has been no claim of responsibility.
Jamali said the bomb was likely an improvised device. The general manager of Pakistan Railways, Anjum Parvaiz, suggested it was remotely-controlled and planted on the track.
Parvaiz said 800 metres of track had been damaged.
A bomb in one of the compartments of a train on the same route last month killed three people and wounded 20 in the central town of Rajanpur in Punjab province.
Pakistan since July 2007 has been gripped by a local Taliban-led insurgency concentrated largely in the northwest.
