They intend to fight back vigorously, starting with a call by the UGTT (Tunisia's national and historic trade union) for demonstrations in Tunis on Friday.
Tunisia's main trade union, the UGTT, did much to encourage opposition groups across the country, but its leaders are blemished by contacts with the former regime.
It comes after the UGTT accused the League for the Protection of the Revolution of attacking its recent march in the capital with knives, sticks, and stones.