A fire tore through a neonatal intensive care unit in a hospital in northern India, killing 10 newborn babies and injuring 16 others.

Axar.az reports that the fire occurred late Friday at a hospital in Jhansi city, Uttar Pradesh state. Officials said the blaze spread quickly through the ward, where 55 infants were being treated. Forty-five babies were rescued and are receiving medical care, said a local official.

It was not immediately clear what sparked the blaze. Brajesh Pathak, the deputy chief minister of the state, visited the hospital and met with families on Saturday. He pledged government support for the victims’ families and promised a thorough investigation.