Audi is looking for an investor for its struggling Brussels plant, production director Gerd Walker told Reuters on Tuesday.

The company had examined several options for the site and discussed them with employees but had not yet made a final decision on the future of the site as none of the options were proven to be economically rational, Walker added.

Volkswagen, which is no longer ruling out plant closures in Germany as part of a cost cutting drive, said in July it was considering closing its Brussels site, which employs about 3,000 people, due to low demand for its higher end electric cars.

The factory produces Audi's electric luxury Q8 e-tron SUV which may be discontinued due to insufficient demand, Reuters nored.

More than 5,000 people marched through Brussels on Monday in solidarity with workers of Audi Brussels, the report added.