Police said on Saturday that over 5,800 challans have been issued after the city government banned the movement of BS-III petrol and BS-IV diesel vehicles.
The Delhi Traffic Police Department informed on Twitter that a total of 5,882 vehicles were stopped or challaned for violations till 6 am on Friday.
On Monday, Environment Minister Gopal Rai said in a press conference that under the third phase of the Graded Response Action Plan, there will be a ban on BS-III petrol and BS-IV diesel four-wheelers in Delhi.
The transport department on Monday had said that owners of vehicles found flouting the rule would be prosecuted under the Motor Vehicles Act with a fine of Rs 20,000.
Vehicles imposed for emergency services and government and election related functions are not covered under the ban.