PESHAWAR - At least four persons were killed and two others sustained injuries in an explosion at a CNG station here on Monday.The dead were on board a car, which exploded at the CNG station on Ring Road. A salesman and manager of the CNG station sustained injuries in the explosion.Sources said that it was cylinder of the car that exploded during CNG gas filling. The explosion damaged the roof of the CNG station. Two nearby cars were also damaged in the incident. Soon after the blast, rescue teams reached the site and shifted the bodies to Lady Reading hospital.This news was published in The Nation newspaper. Read complete newspaper of 22-Jul-2014 here.