A New York police officer, a “beloved” security guard, a young Cornell graduate and a senior executive with investment firm Blackstone were killed Monday when a lone gunman stormed a sprawling office tower in Midtown Manhattan and opened fire.

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.

Police lined up four rows deep to pay respects and New York's mayor and governor extolled the heroic sacrifice of an officer who was among the victims of a gunman's rampage at a New York City office tower this week.

A special prayer service will be held for Officer Didarul Islam on Thursday in the Bronx, as the city mourns the four victims killed in the attack. CBS News New York's Adi Guajardo has more on the fallen officer.

FOX 5 NY's Briella Tomasetti reports live from the Bronx to provide details on the funeral being held for fallen NYPD Det. Didarul Islam, one of four killed in the Midtown mass shooting.

Thousands of familly, friends and colleagues are expected to gather to mourn the NYPD officer killed in this week’s Manhattan office attack at a funeral on Thursday, a day after another grieving family laid their loved one to rest,