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A damaged vehicle is seen at the explosion site in southern Pakistani port city of Karachi on Aug. 4, 2018. At least two people were killed and five others injured seriously in a cylinder blast in Pakistan's southern port city of Karachi on Saturday, local media reported. (Xinhua/Stringer)?

ISLAMABAD, Aug. 4 (Xinhua) -- At least two people were killed and five others injured seriously in a cylinder blast in Pakistan's southern port city of Karachi on Saturday, local media reported.

According to the reports, the cylinder exploded in a building at Jinnah road in Sher Shah area of the city.

While two died on the spot in the impact of the explosion, those injured have been shifted to a nearby hospital, where at least two of them were said to be in critical condition.

A probe has been ordered into the incident to ascertain the cause of the explosion, said police.

Several vehicles parked in the vicinity of the building were also damaged in the incident, said the rescue teams working in the effected area.