QUETTA: A powerful blast at train station late on Wednesday killed at least five and injured at least 20 people in Sibi, DawnNews reported.

Home Secretary Balochistan Nasinullah Bazai, while speaking to DawnNews, vowed to arrest the culprits behind the attack and called a bomb disposal squad at the site to avoid anymore untoward incidents.

According to officials, explosive material was hidden at a tea stall at the platform number two of the station.

At the time of blast, Jaffer Express was stationery at the crowded platform. The train was arriving from Jafferabad and destined for Quetta.

AP adds: Police officer Qasim Salachi says the bomb went off just minutes after the train pulled into the station, as passengers were buying food and drinks.

No group has yet claimed responsibility for the attack.

The dead and injured were being shifted to the District Headquarters Hospital Sibi. Deputy Commissioner Shahid Saleem Qureshi has imposed an emergency in the hospital.

There are children among the injured while eight injured are reported to be in critical condition.

Police and other security agencies have cordoned off the blast site and initiated an investigation.

Balochistan has experienced decades of violence at the hands of separatists who demand a greater share of the province's natural resources. It is also believed to be a base for many Afghan Taliban militants.