Belgian Prime Minister Charles Michel has been bombarded with French fries and squirted with mayonnaise by activists angry at the government's austerity plans.

Mask-wearing women were swiftly tackled by security personnel as Michel looked on, smiling in a mayo-stained suit.

Food-related protests are a Belgian speciality.

In the past, former French president Nicolas Sarkozy and billionaire Microsoft founder Bill Gates have received custard pies in the face while in the country.