A bomb attack has killed three people and injured 15 others on a passenger train in the southern Pakistani city of Hyderabad police said on Saturday.

The explosion wrecked a passenger compartment on the train soon after it left the station in Hyderabad, about 160km (100 miles) north of Karachi.

The train was en route to Mirpur Khas, 40km (24 miles) east of Hyderabad, police said.

Nobody has so far said they carried out the attack.

It follows two bomb blasts in the nearby city of Karachi last month in which fifteen people were killed.

Pakistan has been hit by a dozens of bomb explosions in recent months, most of them either in southern province of Sindh or in the eastern province of Punjab.

Pakistan has blamed previous explosions on neighboring India.