A 75-year-old woman sustained injuries when the slab of a flat in a three-storey "dangerous" building collapsed in Thane city on Thursday, following which the civic authorities vacated the residential premises.

According to the Thane Municipal Corporation's (TMC) Disaster Management Cell, the incident occurred around 4 pm in the Velankani building, a 30- to 35-year-old structure located near Fatima Church in Majiwada village.