India, May 9 -- A high alert was sounded in Delhi, after a Pakistani drone attack was thwarted leading to loud explosions, sirens and blackouts in several border districts in India.

People near India Gate, the iconic war memorial, were asked to leave, and traffic there has been regulated by the police.

"Police will stay alert and will keep active. Night vigil has been intensified. We will deploy extra force in every sensitive area," a police officer told PTI.

The Delhi government has also banned its employees from going on leave until further orders.

Special police commissioners of all zones are holding meetings with deputy commissioners of all 15 districts in the national capital.

Security personnel have increased vigilance at malls...