Indian police are investigating a deadly car explosion in New Delhi under the country's main anti-terrorism law, as forensic experts search for evidence to determine its cause.

The Unlawful Activities (Prevention) Act, often used to investigate acts related to terrorism and threats to national sovereignty, is being utilized in this case.

The blast occurred near the historic Red Fort on Monday evening, killing at least eight people and injuring 20 in what is a rare occurrence in recent years.

Deputy Commissioner of Police Raja Banthia stated that a case has been registered under the anti-terrorism law along with other criminal statutes.

The explosion happened during rush hour, damaging several vehicles and causing traffic disruptions near a metro station.

Authorities have yet to identify the occupants of the car involved in the incident or its owner.

Prime Minister Narendra Modi addressed the nation from the Red Fort on India's Independence Day, an event broadcast annually.

The prime minister is scheduled to travel to Bhutan on Tuesday.

In response to this incident, several states and key facilities have been placed on high alert across the country.

Relatives of the victims gathered at the Lok Nayak hospital to identify their deceased loved ones.

Investigations are in their preliminary stages, with authorities promising a thorough examination of all potential angles related to the attack.