Those injured were taken to the Ram Manohar Lohia Hospital.
A call was recieved at 4.30 am from Karol Bagh's Arpit Palace Hotel and immediately 25 fire tenders were rushed to the spot, the officer at the Delhi Fire Department headquarters told IANS.
Home Minister Satyendar Jain said he has also directed the fire department to inspect buildings which are five floors or more and submit a report on their fire safety compliance within a week.
More than 20 fire tenders were rushed to the spot and rescue operations were underway, it said.
Officials said they believe the blaze was caused by a short circuit. Two staffers of hotel Arpit Palace also died.
Relatives of an Indian hotel staff member who died in an early morning fire at the property look at his wrapped up body after it was handed over from a mortuary at Lady Hardinge Hospital in New Delhi on 12 February 2019. Different agencies pointed out several violations on the part of the hotel's management, including closure of the emergency exit gates at the time of fire, which trapped the victims inside the establishment. "It's gross negligence on the part of the officers who allowed the extra floors to be built", he said. When the fire was brought under control around 7 am, it had claimed 17 lives, including three Myanmar nationals and two Hindustan Petroleum Corporation Limited officials. Gautam Buddh Nagar district magistrate BN Singh had said more than 60 people were inside the hospital when the incident occurred. He further said that a license is issued to a hotel only after inspection.
The exact cause of the fire is not known yet. "I convey my condolences to the families of those who lost their lives".
The Union tourism minister said there were a lot of wooden structures inside which may have helped the fire spread. Incumbent Chief Minister Arvind Kejriwal or his predecessors have used this "confusing tactics" as and when required.