The fire broke out at the Hotel Arpit Palace in a congested part of central Delhi, with images showing it engulfing the entire top floor.
G.C. Misra, Delhi fire brigade director, said the blaze had been brought under control and that 35 people were rescued by firefighters in an operation lasting several hours.
According to reports, among the dead were a woman and a child, who tried to escape the fire by jumping from a window of the hotel located in the busy shopping area of the Capital.
Rescue and police personnel at the site of a massive blaze at Hotel Arpit Palace on Tuesday, after the fire had been doused.
"We have to check the stability of the structure, check every room", Mr Randhawa said.
A video shot by a worker at a nearby hotel showed flames consuming the top of the building, which authorities said contained an unauthorised makeshift kitchen formed from sheets of fiberglass. The last renewal was done on May 25, 2018 and was valid till March 31, said an official of North Delhi Municipal Corporation."The stamped happened as the stairs were narrow". The first tender that reached the spot did not have adequate water.More news: Newborn baby rescued from storm drain in South Africa
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Cooling process is underway and the cause of the fire is yet to be ascertained, he added.
Delhi Police has registered an FIR against the hotel owner.
Prime Minister Narendra Modi condoled the deaths. "There was wooden panelling in the corridor because of which people couldn't use corridors to evacuate", fire officer Vipin Kental said. We had booked four rooms in the hotel.
His sister Jayashree alerted them to the smoke and rushed out to check what was happening, he said.
"A licence is issued only after inspection".