One of the guns used in the South Park Mall shooting was also used during the recent shooting at The Rim shopping center, according to an affidavit.

Officials tested a spent shell casing from the South Park Mall incident and discovered the link.

Two men were arrested Sunday in connection with the shooting that injured four people. Lawrence Frambs, 21, and Daonte Johnson, 22, are facing four counts each of aggravated assault with a deadly weapon, and Frambs will also face charges for marijuana possession.

The pair were arrested in separate locations on the city’s Southeast Side, according to the San Antonio Police Department. Both men declared they were innocent in front of news media Sunday evening.

Police have identified four of the five suspects in the case, the affidavit states.

READ MORE: Two San Antonio men charged in quadruple shooting at South Park Mall

One of the victims told police he was shopping at a jewelry store inside the mall with three others prior to the shooting. They made a purchase and were told their item would not be ready for another 15 minutes, so the group decided to pass the time with a cigarette break outside the southwest exit of the mall.

According to the affidavit, four of the suspects in the case were also at the jewelry store before the shooting. One of the suspects lifted up his shirt and "showed off" his handgun to the other suspects inside the store. Three of the suspects left the mall and got into the Dodge Charger, while the fourth waited at the jewelry store, then followed the four victims outside the mall exit.

A black Dodge Charger pulled up beside them and three suspects exited the vehicle. Two of them opened fire, striking four victims, then the three suspects got back in the car. The fourth suspect that had followed the victims out of the mall also shot at the victims, before all of the suspects got back in the car and fled the scene.

The same car and driver had fled from officers a few hours before the shooting, the affidavit states. One of the suspects, who was not identified in the document, posted pictures of himself after the shooting wearing the same clothing he had been seen wearing on surveillance footage from the shooting.

Police said Thursday the South Park Mall shooting was not random.