The three branches had been subjected to a hacking attack. Technicians were working to restore the system as soon as possible.
The supermarket's direction informed the press on Monday morning that the branch in Windhof opened on 4 May. The doors of branches in Bonnevoie and Merl remain closed until Tuesday 5 May.
The supermarket plans to take legal action with the judicial police.
Three branches remain closed on Saturday due to hacking attack
