U.S. authorities say a man detained as a person of interest in the deadly Brown University mass shooting will be released from custody, as investigators shift their focus in the case.

Police in Atlanta say they prevented a potential mass shooting at Hartsfield-Jackson Atlanta International Airport after officers intercepted an armed man who had allegedly threatened to open fire inside the terminal.

At least two people were killed and five others wounded in a mass shooting early Sunday in northwest Indianapolis, police said.

A 22-year-old woman was killed and five others wounded early Sunday in a mass shooting at a large outdoor gathering on North La Cross Avenue in Chicago’s South Austin neighborhood, police said.

A tragic mass shooting rocked Midtown Manhattan Monday evening, leaving four people dead — including a New York Police Department officer — and several others injured. The attack unfolded during rush hour at a Park Avenue skyscraper that houses corporate offices for the National Football League (NFL).

A mass shooting in Philadelphia’s Grays Ferry neighborhood early Monday morning left three people dead and 10 others injured, according to city police.

Eight people were injured in a mass shooting early Saturday morning outside the 7 Elements Restaurant Bar and Lounge in South Philadelphia, following a physical altercation on an outdoor balcony, police said.

Two people were killed and at least seven others wounded in a mass shooting early Saturday morning in downtown Indianapolis, Indiana, according to police.

At least four people were killed and 14 others wounded in a drive-by mass shooting outside the Artis Lounge nightclub in Chicago's River North neighborhood on Wednesday night, police said.