Federal agents arrested two more suspects involved in a string of jewelry store robberies across five states.

Larry Bernard Gilmore, 43, and Michael Bernard Gilmore, 46, both of Atlanta, were charged Thursday and tied to the armed jewelry store robberies involving  Abigail Lee Kemp, 24, and Lewis Jones III, 35, Acting United States Attorney Christopher P. Canova said.

Six jewelry stores in Georgia, Florida, North Carolina, South Carolina and Tennessee were robbed between April 2015 and January 2016, Canova said.

Federal investigators said that in each robbery, store employees were ordered at gunpoint to the back of the store where they were forced to lie face down on the ground with their hands zip-tied behind their backs.

Hundreds of thousands of dollars in jewelry were stolen, investigators said.

In a statement released by United States Attorney, the Gilmores provided surveillance and security during the robberies and are both being charged with conspiracy to interfere with commerce by threats or violence.