Union minister KJ Alphons Tuesday said the emergency exit of the Arpit Palace hotel, where 17 people were killed in a fire that broke out early Tuesday, was "too narrow" and also locked.
At least 35 others were rescued from the five-storey building.
As many as 30 fire tenders were pressed to carry out the rescue operation.
The officer said that the cause of fire was yet to be investigated. It is estimated some 120 people were inside the building, built around 25 years ago, according to the hotel's website.
A deputy manager of the Hindustan Petroleum Corporation Limited (HPCL) in Visakhapatnam died in the Hotel Arpit Palace fire mishap in Delhi.
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The dead included a woman and a child who tried to escape by jumping from a fifth-floor window of the 65-room hotel in the shopping district of Karol Bagh.
At least 22 fire engines were scrambled to tackle the blaze at the hotel.
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"We have to check the stability of the structure, check every room", Mr Randhawa said.
Authorities appeared to have been negligent in enforcing building laws in the surrounding area, Delhi's urban development minister Satyendar Jain said.
In 2017, 14 people were killed, also in Mumbai, when a huge blaze tore through a popular restaurant.
A fire accident in a hotel at Delhi's Karol Bagh area has consumed 17 lives.
"There was wooden paneling on corridor because of which people couldn't use corridors to evacuate", news agency ANI quoted fire officer Vipin Kental as saying.
We will come out with it by today, and fix the responsibility on the hotel owners if there was any laxity on their part, " he added.
"As per information gathered from the site, it reveals that the incidence of fire accrued at second floor at around 3.30am on February 12 due to short-circuit", the official said.