New Delhi, India – At least 21 people have died and 40 others have been injured after a deadly fire broke out at a hotel in the Indian capital, Delhi.

Indian authorities said a large-scale firefighting and rescue operation was underway. Initial reports said 18 of the dead were foreigners.

Local sources reported that a number of hotel guests were trapped inside the building when the fire broke out, and rescue workers were trying to rescue them.

Some of the injured were in critical condition and were being treated at hospitals. Authorities have launched an investigation to determine the cause of the fire.

No further details have been released about the identities of the victims or the exact cause of the incident. Authorities have promised to announce the results of the investigation once it is complete.