The U.N.-backed tribunal investigating the 2005 murder of former Lebanese prime minister Rafik Hariri has released its indictment against the four Hezbollah members who prosecutors say carried out the attack.

The court said Wednesday it has confirmed the charges against the suspects and made the indictment public after prosecutors showed there was sufficient evidence to bring the case to trial.

It said the indictment had been kept secret to ensure authorities could effectively search for and arrest the accused.

The head of the tribunal said last week Lebanese authorities have been unable to arrest the four men, who are members of the Lebanon-based Hezbollah militant group. Hezbollah has denied involvement in the killing.

The court also said Wednesday some portions of the document will remain confidential in order to protect victims and witnesses.

The prosecutor in the case welcomed the court's order, saying in a statement the public will “finally” know the details of the allegations against the suspects.

Judge Antonio Cassese has urged the four men to appear before the court and stressed the proceedings will be conducted fairly.

Mr. Hariri and 22 others were killed in a massive truck bombing in the Lebanese capital, Beirut.