New York City is mourning NYPD Officer Didarul Islam and three other people killed in Monday's shooting inside an office building at 345 Park Ave.

NEW YORK -- A 27-year-old man wearing body armor and carrying an M4 assault rifle shot and killed four people, including off-duty New York Police Department Officer Didarul Islam, who was working security in a Midtown Manhattan office building, officials said during a press conference Monday evening.

Julia Hyman, an employee of Rudin Management and one of four victims of cowardly killer Shane Tamura, was remembered as "delightful" at her funeral.

Hyman, a Manhattan native who graduated from Cornell in 2020, was "so full of promise and so deeply loved," her uncle said during the memorial service.