At least eight people were killed in an explosion near the landmark Red Fort in a densely populated district of the Indian capital New Delhi, city police said.

The blast occurred in a car near the Red Fort, but the exact cause was not immediately known, and was being investigated, city police spokesperson Sanjay Tyagi said.

At least 11 people were injured, TV channels said.

Visuals on local media showed flames and smoke billowing from more than one vehicle in what was described as a congested street located near a metro station in the old part of Delhi.

Click to play video: 'Anand seeks to repair Canada’s relations with India'

Anand seeks to repair Canada’s relations with India

At least six vehicles and three autorickshaws caught fire, Delhi’s deputy fire chief said, adding that the flames had been doused by firefighting teams.

Story continues below advertisement

“We heard a big sound, our windows shook,” one resident who did not give a name, told NDTV.

For news impacting Canada and around the world, sign up for breaking news alerts delivered directly to you when they happen.

Get breaking National news

For news impacting Canada and around the world, sign up for breaking news alerts delivered directly to you when they happen.

Police tried to clear crowds that gathered around the site of the incident.

The Red Fort, known in India as the Lal Qila, is a 17th-century, Mughal-era fort located in the old city and visited by tourists through the year.