The entry ban on trucks in Delhi was imposed from 11 PM on November 9 after the pollution levels touched 'severe plus' category. The ban expired at 11 PM on November 12.
"The air pollution level kept fluctuating even after the prescribed period of ban on trucks. It has been extended till further orders and a notification to this effect has also been issued," the official said.
As per the Graded Response Action Plan (GRAP), which has been implemented in the city amid rising air pollution, the ban on entry of truck in Delhi comes into force when PM2.5 levels cross 300 microgramme per metre cube and PM10 levels rise over 500 microgramme per meter cube.