, The Johor Department of Environment (DOE) warned those involved in the illegal cleaning of tankers in Johor waters that the activity could be suicidal as it was a dangerous operation. Its director Dr. Abdul Rahman Awang said that the workers involved should come forward and provide information on such activities to the department. The involvement of untrained workers in the illegal cleaning of tankers could result in tragic incidents. Abdul Rahman said that according to information received by the department, the illegal cleaning usually occurred during week-ends and when the prevailing winds were favourable to avoid detection by the authorities. He added that the department was stepping up operations to put an end to the activity.