Police said hotel owner Lavkesh Bajaj was taken into custody late Wednesday, hours after the blaze engulfed the Flourish Stay hotel in the capital’s Malviya Nagar area.

Authorities said at least 21 people died in the fire, including several foreign nationals. Two victims have been identified as citizens of Liberia and Mozambique.

Witnesses said some trapped guests jumped from upper floors onto mattresses placed below as flames spread through the building. Several survivors were hospitalized with severe burns and injuries sustained while escaping.

The incident has renewed concerns over fire safety standards in India, where deadly building fires are frequently linked to inadequate safety measures and poor enforcement of regulations.

In a separate incident on Thursday, four people were killed in a fire that broke out in an intensive care unit at a hospital in Muzaffarpur, in the eastern state of Bihar, local officials said.

The building housed a restaurant on the ground floor and a hotel above. Firefighters deployed eight fire engines to contain the blaze and rescued more than 40 people, who were taken to nearby hospitals for treatment.

Authorities said the cause of the fire was not immediately known and an investigation is underway.

Television images showed thick smoke engulfing the building as trapped occupants called for help from windows. Local residents joined emergency crews in rescue efforts, helping evacuate people and carry the injured to safety.

Local media reported that some of those killed were foreign nationals who had traveled to India for medical treatment and were staying in nearby accommodations.

Prime Minister Narendra Modi expressed condolences to the victims’ families and announced financial assistance of 200,000 rupees ($2,088) for the families of those killed.

The incident is the latest in a series of deadly fires in India, where safety violations and poor enforcement of building regulations remain a recurring concern.