Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

A New York City police officer who was among the four people shot and killed by a gunman during a rampage at a Manhattan office tower will be laid to rest Thursday. Officer Didarul Islam, 36, was fatally shot Monday in a midtown building housing the National Football League’s headquarters.

Five people—including the suspected perpetrator Devon Tamura and NYPD officer Didarul Islam—were left dead at an office building in Midtow.