Maharashtra Chief Minister Devendra Fadnavis on Thursday expressed grief over the death of 17 persons in a building collapse at Virar in Palghar district and announced an assistance of Rs 5 lakh to the kin of the deceased, reported news agency PTI.

The building, which was allegedly unauthorised and housed nearly 50 flats, collapsed on an adjacent vacant tenement at Vijay Nagar in Virar area of Palghar, adjoining Mumbai, at 12.05 am on Wednesday, according to officials.

A one-year-old girl's birthday party was underway on the fourth floor when 12 flats in a wing of the building collapsed, trapping residents and guests under the debris, as per eyewitnesses. The child was among the deceased, reported PTI.