Indian authorities have launched an anti-terrorism investigation into a car explosion in New Delhi that killed at least 12 people and injured 20 others on Monday evening.
The blast occurred near a busy metro station close to the historic Red Fort, a major tourist site in the capital.
Prime Minister Narendra Modi described the incident as a "conspiracy" and assured that those responsible would be brought to justice.
The National Investigation Agency has taken over the probe, registering the case under the Unlawful Activities (Prevention) Act.
This law grants broader powers to detain suspects and investigate potential terrorist activities.
Officials have not yet disclosed the exact cause of the explosion in the Hyundai i20 vehicle but are exploring all possibilities.
Home Minister Amit Shah chaired a high-level security review meeting with senior officials, though no details were released.
The Red Fort has been closed for three days to facilitate the ongoing investigation.
Reports indicate the vehicle originated in Faridabad, Haryana, about 30 kilometers away, where police seized a large cache of explosives and arrested two Kashmiri doctors earlier that day.
One arrested doctor is reportedly linked to the car, which was tracked via CCTV and toll plaza data from Faridabad to the blast site over an 11-hour period.
The vehicle entered a parking area near the Red Fort at 3:19 p.m., remained for nearly three hours, and exploded at 6:46 p.m. after moving toward the site.
Security has been intensified across Delhi, with borders under tight scrutiny and alerts issued in states including Rajasthan, Odisha, Uttar Pradesh, and Mumbai.
The explosion marks the first major security incident in the capital since an April shooting in Kashmir that killed 26.