The blast took place while Karachi family traveling to Pir Sohawa, a well known picnic spot on Margalla Hills area of Islamabad. The other passengers have been rescued.
Local officials told the PakistanTribe.com that a family of Baldia Town, Karachi was in the area to paticipate in a wedding event. After the event they are on the way to Margalla Hills when cylinder exploded.
Rescue workers rushed to the accident area but two women were expired on the spot.