New York: Zohran Mamdani was sworn in as Mayor of New York City soon after midnight in a private ceremony in an abandoned beaux-arts subway station – a prelude to daylong celebrations set to include a second, public swearing-in and a block party outside city hall.

Mamdani, 34, was sworn into office by the New York attorney general, Letitia James, surrounded by wife, Rama Duwaji, members of his immediate family, including Mira Nair, his mother and a film-maker, and his father, Mahmood Mamdani, a professor of African studies at Columbia University.