The man who allegedly opened fire on several people at a building in New York City on Monday was said to be targeting the NFL, and a note he left included

Tamura worked as a surveillance department employee at the Horseshoe hotel and casino in Las Vegas, a spokesperson for the Horseshoe said on Tuesday. Several squad cars from the Las Vegas Metro Police were seen at the entrances to a gated neighborhood where Tamura was believed to have lived.

Five people, including a New York City police officer, died Monday in a Midtown shooting. Suspected gunman Shane Devon Tamura died of a self-inflicted gunshot wound, officials said.