A tanker truck carrying 2 tonnes of aluminium chloride was emptied into a tank containing 11 tonnes of sodium hypochlorite. The driver came for delivery outside working hours and was misguided by the security guards. The mixture caused chlorine to be released. The emissions poisoned 46 employees, six residents and 58 employees of neighbouring facilities who were taken to 11 hospitals. 230 families were evacuated for 7 hours. The chlorine cloud impacted a surface of 4 km².