( CNN ) A man who shot three people at a Pittsburgh-area mall Saturday has been arrested , police said Sunday . Two of the three victims were critically wounded at Monroeville Mall in Pennsylvania , authorities said . The third was in stable condition with injuries that were not life-threatening , Monroeville police Chief Kenneth `` Doug '' Cole said . A motive for the shooting has not been determined . But Cole said he thinks the gunman knew one of the victims . `` We believe that one of those three people that were shot was a targeted individual , so this was not a random , '' the police chief told reporters Saturday night . Allegheny County Police Lt. Andy Schurman said the two other shooting victims were apparently bystanders . `` The two innocent victims , we do n't believe were the intended targets , '' he said . Schurman said the targeted victim was the most seriously wounded . The shooting took place in a Macy 's store on the lower level of the mall . Two men and a woman were shot . Witnesses at the mall , about 10 miles east of downtown Pittsburgh , described a chaotic scene . `` We were in Dick 's ( Sporting Goods ) , and all of sudden a whole bunch of people started running , '' Madison Strohl told CNN . `` There were five shots fired right outside of the Macy 's inside the mall ... it was really scary . '' Two officers were working at the mall when the shooting occurred , Cole said . The mall was locked down and evacuated , with 15 agencies helping secure stores while authorities looked for the gunman . A series of fights at the mall forced it to close temporarily in December , CNN affiliate KDKA said . `` There is a pattern here as you are well aware , '' the police chief said . `` We do n't know why the mall is having the problem it 's having . '' `` Back in the '90s , we had shootings down there ... associated with gangs and drug activities , '' Cole said . `` Maybe that 's coming back around . '' CNN 's Laura Ly contributed to this report .
Suspect arrested in shooting at Monroeville Mall near Pittsburgh . Police say they think one victim was targeted and the other two were bystanders .