India, Dec. 18 -- Delhi Police and transport authorities have stepped up enforcement at the city's borders after fresh restrictions on non-compliant vehicles came into effect today, with violators facing fines of up to Rs.20,000 or being turned back.

Delhi Environment Minister Manjinder Singh Sirsa announced that only BS6-compliant vehicles registered outside Delhi will be permitted to enter the capital.

To enforce the directive, Delhi Police teams have been deployed at key entry points, including Kalindi Kunj, Chilla, Ghazipur and the DND Flyway. Barricades have been set up at these locations, where officers are checking vehicle registrations, emission standards and Pollution Under Control Certificates (PUCC).

The primary focus of the...