Police have identified the man who they say entered a Midtown Manhattan office building wearing body armor and opened fire, killing four people with a high-powered rifle, as Shane Devon Tamura.

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.

President Donald Trump said he had been briefed on the mass shooting in a Manhattan office tower that left at least four people dead, an incident that shut down a large stretch of Midtown and sent employees in the area into lockdown.