At least six people, including a woman and three children, were killed Friday when a bomb planted on a railway track exploded derailing a passenger train in central Pakistan.

Two bogies of the train derailed following the blast which took place near Bahawalpur in Punjab province, Geo TV reported. It said six people were killed and several injured in the blast.

Some of the injured, said to be in critical condition, were rushed to Victoris Hospital in Bahawalpur while rescue teams have also been sent to the accident site, the report said. Citing police, it said the explosives were planted under the railway lines which damaged two bogies. Several people were still trapped in the bogies while the train services had been suspended on the track after the blast.