Czech Education Minister Ondrej Liska (Green Party, SZ) wants the government to discuss the rightist extremists' action in Litvinov, north Bohemia, last Saturday, he says in a statement his party sent to CTK.
Some 300 to 400 extremists attended an unauthorised rally in Litvinov during which nationalists wanted to enter the Janov housing estate inhabited by Romanies, but the police succeeded in preventing a clash.
Four people, including three policemen, were injured in the action, however.
The extremists have said on their web page that they will return to Janov and that there will be more of them.
"Attacking and offending fellow citizens over the colour of their complexion is a manifestation of primitivism that modern society must neither tolerate nor overlook," Liska wrote.
Romany civic associations from the Romani Alliance movement have called on the government to quickly deal with the situation in Litvinov.