BANGKOK (AP) — Thailand's film censors have banned a documentary about the country's long-running border dispute with neighboring Cambodia as a threat to national security.

"Boundary" tells the story of the Thai-Cambodia conflict through accounts of an ex-soldier who lives near the border, as well as villagers from the two countries.

Director Nontawat Numbenchapol said Wednesday that the Culture Ministry's film screening office informed him the movie's content is a threat to national security and international relations.

The film also shows scenes from the 2011 political protests in Bangkok that left more than 90 people dead.

The decision comes as the border dispute case is being heard by the International Court of Justice in the Hague, Netherlands.

The budget documentary premiered at the Berlin International Film Festival in February.