A fire killed at least 43 people at a factory in the northern part of the Indian capital, officials said.
It broke out on Sunday morning in the Anaj Mandi area and spread quickly, local media reported.
Prime Minister Narendra Modi tweeted that it was “extremely horrific”.
“Authorities are providing all possible assistance at the site of the tragedy,” Modi said.
Home minister Amit Shah said in a tweet that there was a “tragic loss of previous lives” and that he had “instructed concerned authorities to provide all possible assistance on urgent basis.”