The international tribunal dealing with the killing of former Prime Minister Rafik Hariri of Lebanon has charged two leading Lebanese journalists with contempt of court and obstruction of justice over the publication of confidential information about possible witnesses for the prosecution.

The two journalists — Ibrahim al-Amin, the editor of Al Akhbar, and Karma al-Khayat, the deputy head of news of Al Jadeed TV — have been summoned to appear before the court on May 13, the Special Tribunal for Lebanon said in a statement issued Thursday.

The two parent companies, Akhbar Beirut and New TV, are also criminally accountable, the court said.

It was not immediately known how the two news organizations planned to react. The journalists or representatives of the companies may choose whether to appear in person at the tribunal, based in the Netherlands, or attend the first hearing via video link. But if they ignore the summons, arrest warrants may follow, a lawyer familiar with the case said.