Monday evening was busy as usual near the Red Fort metro station in India's capital Delhi when the sound of a loud blast broke through the cacophony on the streets.

An explosion in a car killed at least eight people and injured more than 20. It was so powerful that several vehicles nearby almost melted, and people could hear the blast from kilometers away.

The police are still investigating what caused the blast but the fact that it happened in one of the most secure and busy areas of Delhi has shocked people.

On one side is Chandni Chowk - a busy trading and clothing hub that is busier than usual at this time of the year due to the peak wedding season.

And on the other side is the 17th Century Red Fort which attracts thousands of tourists every day.

Sandwiched between the two is the road where the explosion took place. Within minutes, confusion and alarm spread from the scene to the rest of the city.

Some readers may find the details below disturbing

Mohamed Hafiz, who lives less than 200m from the spot, said his house shook, and he and others ran out thinking it was an earthquake.

What he saw on the street terrified him: people were running in all directions, cars were on fire, and bodies lay on the road. Some locals were trying to help the injured.

There was blood everywhere. People were in shock. The scene was too disturbing - I could even see body parts, he said.

As local media broke the news, fear and panic swept through the city. Police declared a high alert, and neighboring states quickly followed suit.

After visiting the hospital where the injured had been taken, we drove to the site of the blast. The area was usually teeming with people late into the night but was empty now, apart from security personnel and journalists.

There were mangled remains of cars, rickshaws, and tuk-tuks. Blood stains could still be seen on the road. Some locals gathered, visibly shaken and worried about their immediate future.

Ram Singh, who drives a small vehicle to ferry goods from stockrooms to shops, expressed concern over how this incident might affect his business, saying, I hope a sense of security soon returns. I hope police will be able to restore trust fairly quickly.