Three gases were detected in the atmosphere during the recent severe air pollution in Pasir Gudang, one of which was methyl mercaptan gas, and the presence of which was an anomaly, Energy, Science, Technology, Environment and Climate Change Minister Yeo Bee Yin said today.

She named the two other gases as acrylonitrile and acrolein.

She said the ministry has initiated immediate measures to dispose of factors that contribute to the presence of the gases and authorities are also continuing enforcement efforts as well as monitoring chemical factories in Pasir Gudang.

However, these three gases were not detected in the blood and urine samples of 10 patients from eight schools,” she told a joint press conference with Health Minister Dr Dzulkefly Ahmad on the situation in Pasir Gudang.