Four people were killed and a fifth was injured in a mass shooting at a Midtown Manhattan office building on Monday.

Suspect Shane Tamura died by suicide after the Monday mass shooting at 345 Park Avenue, which is home to NFL headquarters.

The Midtown Manhattan skyscraper where the shooting occurred is a corporate office building housing tenants like Blackstone, KPMG and the National Football League.Start the day smarter. Get all the ...