A powerful explosion inside a moving passenger train killed at least one person and wounded eight others in eastern Pakistan on Thursday, police and a railway spokesman said.
District Police Chief Mian Mahboob said the explosion happened in Chichawatni, a district in the eastern Punjab province.
He said officers were still trying to determine whether it was a bomb or something else that caused the explosion while the train traveled between Quetta, the capital of southwestern Baluchistan province, to the northwestern city of Peshawar.
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There was no immediate claim of responsibility.
For over a decade, Baluchistan has been the scene of a low-intensity insurgency by ethnic Baluch separatists who want autonomy or independence. They often target passenger trains and security forces in Baluchistan.
Babar Ali Raza, a spokesman for Pakistan Railways, also said that there was a blast on the Jaafer Express passenger train, but experts were trying to determine the details. He said the dead and wounded are being transported to a nearby hospital.
Chichawatni is roughly 200 kilometers (120 miles) southwest of Lahore, the capital of the Punjab province.