Sebije Nelovic had just taken out the trash from one conference room and was heading into another when she heard the first loud pops echo down the hallway.

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

Muhammad Mainul Islam, a cousin of New York Police Department Officer Didarul Islam, said the victim's father had a stroke ...

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

Cops identified a man who sold the weapon to mass shooter Shane Tamura as his former supervisor in the Las Vegas area.

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 ...

The New York City building that was the site of a mass shooting had significant security measures in place, raising questions ...

Didarul Islam, 36, was fatally shot during Monday’s Midtown Manhattan shooting. Sources say the off-duty NYPD officer was ...

NEW YORK -- A 27-year-old man wearing body armor and carrying an M4 assault rifle shot and killed four people, including ...

New York City police detectives searched a studio apartment in Las Vegas that belonged to the suspected gunman in Monday's ...

Authorities say the man who killed four people at a Manhattan office building bought the rifle he used in the attack and the ...