India, Nov. 11 -- Security arrangements have been strengthened across central and north Delhi, particularly in the Chandni Chowk, Red Fort, and Daryaganj areas, a day after an explosion in a car near the historic Red Fort during the evening rush hour killed at least eight people and injured 21.

Police and paramilitary personnel were deployed at key intersections to regulate vehicular movement. People aware of the matter said local and district-level police units have been instructed to maintain heightened vigilance and remain alert for crowds, suspicious persons, or abandoned objects. Additional police teams have been deployed near heritage sites, markets, and public places.

"Traffic police and local units are maintaining strict surveil...