(CNN) -- A shooting outside a crowded Florida mall on Friday night left one man dead and more than 100 shell casings at the scene, authorities said.
Lt. Jay Rodriguez of the Fort Myers Police Department said two men were walking in the parking lot of Edison Mall when an unknown number of assailants pulled up in a vehicle with high-powered rifles and started firing.
One man was killed; his name was not released pending notification of relatives. The other man was not hit.
Rodriguez said shell casings were found up and down two rows of the parking lot, leading authorities to believe the attackers were targeting a man "as he was running towards the mall."
"Three vehicles were completely shot up. The wall of the mall was shot up pretty good," Rodriguez said, adding that the mall was packed with holiday shoppers.
Police are looking for the unidentified attackers, who fled in a gray four-door vehicle.
The motive for the shooting was not immediately clear.
CNN's Maria P. White contributed to this report.