India, July 29 -- A heartbreaking ripple of grief has struck the family of NYPD officer Didarul Islam after he was killed during a mass shooting in Midtown Manhattan. The off-duty cop's father suffered a stroke upon hearing the news that his son was among the victims of the incident on 345 Park Avenue, New York Post reported.

On the night of July 28, Didarul Islam was working as a private security guard at a Park Avenue office building in Midtown. A gunman, identified as Shane Tamura, opened fire inside the lobby of the 44-story tower. Officer Islam, along with three other civilians, was killed. Tamura then made his way upstairs and took his own life. The building also houses several big-name offices, including the NFL's headquarters.

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