India, Nov. 11 -- A CCTV footage from the Old Delhi area showed, from a distance, the exact moment of explosion that killed at least 13 people near Red Fort on Monday evening.

The explosion in a car near the Red Fort metro station killed at least 13 people and injured 21 others, according to officials. Authorities are investigating the incident from all angles, with heavy security arrangements in place across the national capital.

The historic Red Fort has been closed to visitors for the next three days, while the Delhi Metro Rail Corporation (DMRC) has also closed the Lal Qila Metro Station on the violet line for security reasons.

Eyewitnesses, local vendors and residents near the scene of the blast recalled the horrifying moment and ...