Spontaneous protests began at AB InBev's factories and warehouses across the country on Friday morning.
The news was reported by the socialist union FGTB/ABVV and its Christian counterpart CSC/ACV.
According to the unions, there is currently a "general malaise" within the brewing giant. They also highlight the issue of "toxic management."
With these actions, the unions want to send a signal that "things cannot continue as they are."