Among the dead were a police officer, a security guard and two people who worked at companies in the building. An NFL employee was badly wounded but survived.

A gunman who killed four people at a Manhattan office building bought the rifle from his supervisor at a Las Vegas casino, authorities said.

An attorney for the man who sold a rifle used in the Monday mass shooting in New York City said Thursday that the sale of the firearm to the gunman was done in compliance with state and federal law.