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Photo taken on March 17, 2019 with mobile phone shows damaged compartments of a passenger train at the attack site in Nasirabad, southwest Pakistan. At least three people were killed and six others injured on Sunday as a bomb blast hit a passenger train in Nasirabad district of Pakistan's southwest Balochistan province, local police said. (Xinhua/Stringer)

ISLAMABAD, March 17 (Xinhua) -- At least three people were killed and six others injured on Sunday as a bomb blast hit a passenger train in Nasirabad district of Pakistan's southwest Balochistan province, local police said.

District Police Officer Irfan Bashir told media that some unknown miscreants planted an improvised explosive device at the railway track and attacked a passenger train named Jaffar Express in Rabbi Area of Dera Murad Jamali region in Nasirabad.

Police and security forces rushed to the site and shifted the bodies and injured to the district hospital.

The officer added that the blast damaged a portion of the track and derailed five coaches of the train which was coming from Rawalpindi in eastern Punjab province to Balochistan's provincial capital Quetta.

The railway traffic has been suspended on the track as police launched an investigation and search operation after the attack.

Police said the investigation is in progress to ascertain how much explosives material was used and how it was detonated.

No group claimed the attack yet.