Two directors of a company that sells and repair construction machinery were charged in the Selayang Sessions Court today with two counts of committing mischief by disposing and releasing waste containing hazardous materials into Sungai Gong, Rawang.

Chai Kin Sang, 62, and his son, Chai Wern Teik, 31, pleaded not guilty to both the charges which were read out before judge Maziah Joary Mohd Tajudin...