A New York City police officer and three other people were shot and killed inside a Midtown Manhattan office building on Monday evening by a gunman armed with a high-powered rifle, police confirmed.The suspect,

Didarul Islam, a 36-year-old New York Police Department officer, was among four people killed Monday evening in Midtown Manhattan when a gunman stormed the lobby of the sprawling 345 Park Avenue office tower and opened fire.

Four people were killed, including an off-duty New York City police officer, when a gunman opened fire in an office tower before fatally shooting himself, officials said.