A senior U.S. official says Kosovo must set up a court to try former ethnic Albanian guerrillas for suspected organ-trafficking and the disappearance of hundreds of Serb captives if it wants to avoid Russia and Serbia dealing with the issue at the United Nations.

Stephen Rapp, U.S. Ambassador for War Crimes, made the comments in an interview with Koha Ditore daily on Tuesday. Rapp was in Kosovo to drum up support for the legislation that needs the backing of 81 out of 120 lawmakers, many of whom are former rebels.

An EU-run team of judges would then handle the proceedings.

A Council of Europe report named former Prime Minister Hashim Thaci as head of the criminal network. Rapp said up to 12 people could be indicted.