The Las Vegas casino security supervisor who sold the assault-style rifle used in Monday's mass shooting in a Park Avenue office building complied with the law, his attorney said.

A man stalked through a Manhattan office tower firing a rifle, killing four people, including a New York City police officer, and wounding a fifth before taking his own life, officials said.

An NYPD spokesperson told FOX 5 NY's Linda Schmidt that investigators have questioned the family members of the Midtown office shooting's gunman, including his parents.

Pittsburgh Public Safety Director Lee Schmidt is at the scene talking with officers. It was not immediately clear if there were any

Multiple police are on the scene of a reported shooting Downtown Pittsburgh Friday afternoon. Pittsburgh Police are on multiple scenes on Penn Avenue after a shooting was reported near Garrison Place after 4:15 p.