At least three people have been killed and 10 wounded in a passenger train bomb attack in Pakistan's southwestern Balochistan province, according to officials.

The bomb went off on Friday near the village of Mach, about 65km southeast of the provincial capital of Quetta. 

"Three innocent people have been killed in this attack," railways minister Khwaja Saad Rafique told reporters outside parliament in the capital Islamabad. 

Railway official Tufail Ahmad told The Associated Press news agency the casualties were taken to nearby hospitals, with some of the wounded passengers being in critical condition.

No one has yet claimed responsibility for the attack on the train that was heading to the city of Rawalpindi from Quetta.

For more than a decade, Balochistan has been the scene of a low-intensity attacks by separatist Baloch groups who want autonomy or outright independence.

Source: Al Jazeera News And News Agencies