(CNN) — During evening rush hour in New York City on Monday, a man calmly walked into a Park Avenue office building lobby and killed a police officer, then opened fire on other innocent strangers.

After a deadly shooting at an NYC building that housed NFL and Blackstone offices, safety experts say it’s high time ...

Officer Didarul Islam Among Five Victims in Manhattan Mass ShootingOn Monday evening, tragedy struck New York City as NYPD ...

There were 23 shell casings and 13 bullet fragments recovered from the lobby of 345 Park Avenue and 24 spent shell casings on ...

Roger Goodell also gave a health update on the league employee who was seriously injured in the gun attack that killed four ...

The owner of a private security business on Park Avenue said he questions how a shooter got so far into a Midtown office ...

Officer Didarul Islam, killed in the Midtown shooting, was honored at a Bronx funeral and is expected to be laid to rest in ...

Four people, including an off-duty New York City police officer, were killed Monday when a gunman carrying a rifle opened ...

A long-time office cleaner said she encountered the suspected in a mass shooting in a Midtown Manhattan office building.

Family, friends and members of the New York City Police Department will come together on Thursday for a funeral for the "hero ...

Police are still piecing together Shane Tamura’s movements but his black BMW traveled cross-country through Colorado, ...

Officials said the gunman fatally shot himself after his attack, which set off a chaotic scene that rippled out into the ...