SIALKOT - A balloon-seller was killed when his gas cylinder, affixed on his handcart, exploded while filling gas in balloons in Saddar Bazaar Sialkot Cantt.  Ilyas, 42, was father of five children. Meanwhile, Sughra Bibi, 57, was killed while her son Khalid was injured seriously when a truck hit their bike on Khawaja Safdar Road.  Rescuers shifted the body to local hospital for autopsy.