Three people were injured when a part of a cornice at Bikash Bhavan, the headquarters of the West Bengal Education Department located in Salt Lake area near Kolkata, collapsed on Monday, police said.

An officer of the Bidhannagar Police Commissionerate said two security personnel sitting near the main gate and a person coming out of the 10-storey building were injured after being hit by chunks of cement and bricks that had broken off the cornice.