At least five people were killed and 40 others wounded when a loud explosion ripped apart a bus parked outside the gates of Karachi Cantonment Station, the main railway station in the city.
According to media reports, the blast occurred in a passenger bus standing near the station, killing three people and injuring 40 others.
Extensive fire caught the two buses, motorcycles and nearby shops after the blast. The bodies and injured were shifted to Jinnah Hospital in the city.
Deputy Director of Jinnah Hospital Dr. Seemi Jamal said that almost two bodies and 40 injured people were brought to the hospital after the blast. Eight of those injured are said to be in critical condition and emergency has been declared at the hospital.
According to the police the bus was bound for Sargodha from Karachi. Spokesman from the Sindh police, Imran Shaukhat said the cause of the explosion was not yet known.
Bomb Disposal Squad (BDS) officials said the blast occurred in a passenger bus after two CNG cylinders exploded back to back.
Interior Minister Rehman Malik has taken notice of the explosion and summoned a report from IG Sindh. SSP CID Chaudhry Aslam said there was no ball bearings recovered from the site which was an indication that a cylinder might have exploded.