Indian Prime Minister Narendra Modi yesterday called a deadly car explosion in the heart of the capital that killed at least 13 people a "conspiracy", vowing those responsible will face justice.

Police are investigating the blast incident under a law used to fight "terrorism", an officer said. The ministry of home affairs handed over the blast case to the National Investigation Agency (NIA). The death toll had risen to 13, reports The Hindu online.

Investigators yesterday took three more doctors from Faridabad's Al-Falah University into custody. The university has made headlines after three doctors linked to it came under the spotlight for their alleged involvement in terrorist activities, reports NDTV online.

These three doctors are Muzammil Shakeel, Umar Mohammed and Shaheed Shahid. Muzammil and Umar are from Kashmir and Shaheen is from Lucknow.