Atlanta police were investigating a double shooting that left one person critically wounded Tuesday night outside a Family Dollar store on the city's northwest side.

Two groups of people on opposite sides of the street in the 2600 block of Donald Lee Hollowell Parkway apparently got into an argument about 8 p.m., Officer John Chafee of the Atlanta Police Department told the AJC.

"The argument escalated into gunfire with shots being fired by at least one shooter in one group toward the other group where the victims were," Chafee said in an email.

Police found one male shot in the chest, and another shot in the arm, Chafee said. Both were transported to Grady Memorial Hospital. The male with the chest wound was in critical condition, while the second male was stable.

Officers canvassed the area for evidence and witnesses, and detectives remained at the scene, Chafee said. No arrests had been made as of late Tuesday night.