Serbian far-right leader Vojislav Seselj is defying a U.N. war crimes court one day after returning home on provisional release, saying he won't go back if requested by the judges.

Seselj, accused of recruiting notorious paramilitary forces during the bloody Balkan wars, said at a news conference on Thursday that "I will not go voluntarily. They will have to arrest me."

Seselj returned home on Wednesday after the tribunal for the former Yugoslavia in The Hague, Netherlands, released him for medical treatment in Serbia on condition that he doesn't interfere with victims or witnesses and that he goes back if summoned.

Serbian doctors who visited the 60-year-old say he is suffering from colon cancer that has spread to his liver.