Hungary's prime minister says neighboring Romania is waging a 'political campaign' against the leaders of Romania's large Hungarian minority.

Prime Minister Viktor Orban told Hungarian diplomats Monday that "under the pretext of constitutionality, legality and the fight against corruption, in reality we have to register a political campaign against Hungarian politicians there."

Orban said Hungary would "have to raise this issue in the proper form."

Last week, Laszlo Tokes, a Calvinist minister whose protests sparked the fall of Romania's communist regime, was stripped by a court of a high state honor for suggesting in 2013 that Hungary should take on the "status of protector" for Hungarians in Romania's Transylvania region.

Some 1.3 million Hungarians live in Romania, mostly on territory that Hungary lost after World War I.