A week after shocking mass shooting outside River North lounge, links to city’s worst gang feud have surfaced again.

Cook County Crime Stoppers announced Monday that they are offering a cash reward of $10,000 for information leading to arrests in a mass shooting that left four people dead and 14 wounded outside the Artis Restaurant and Lounge in Chicago's River North neighborhood last week.

A reward is now being offered for information on a mass shooting left 18 people shot, four fatally, near a restaurant in River North last week.