NEW DELHI, Nov. 21 -- In the days since the November 10 blast near the Red Fort, Delhi Police has stepped up vigilance across the capital, deploying drones in markets with high footfall, installing metal detectors at key places, checking parking lots and car dealers, and reviving old citizen initiatives, officials aware of the matter said.

In high footfall areas, such as markets, as well congested areas in northeast, north, and south Delhi, which have the most number of congested places, police are also using drones at least twice a day to keep check on suspicious activity.

Deputy Commissioner of Police (DCP) (south east) Hemant Tiwari said that guest houses, small hotels, cafes and cinema halls are also being checked regularly for any ...