Two persons, including a woman, were killed and three others were injured when a gas cylinder fitted in a passenger pick-up exploded at a Compressed Natural Gas (CNG) station here on Sunday, police said. The cylinder exploded when it was being filled up with CNG at a gas station near Lalazar Stadium, Attock city. As a result, pick-up driver Iftikhar Ahmed, a resident of Sanjwal, and a passenger, Zahida Bibi from Dhoke Jogi, died on the spot, while three other passengers