The Delhi Police has been put on high alert, and massive checking drives are being carried out across the national capital following the powerful explosion near the Red Fort metro station that left 12 people dead and many injured, officials said on Wednesday, reported news agency PTI.

Police personnel, along with paramilitary forces, are deployed in large numbers at all the entry and exit points of Delhi. Vehicles entering and leaving the city are being thoroughly checked as part of the intensified security measures, they said.