More on the 'Der Spiegel-Indictments' from, you guessed it, Der Spiegel!

"... Daniel Fransen, a judge at the special tribunal, said in a statement that the details of charges and the names of the alleged killers should remain secret for now, in order not to make the arrests more difficult. The four suspects are believed to all be members of the militant Shiite movement Hezbollah. Lebanese media and the Associated Press reported that the men charged are Mustafa Badreddine, the former Hezbollah deputy military commander who is believed to have supervised the Hariri assassination, another senior official, Salim Ayyash, who holds US citizenship, and two lower-ranking Hezbollah members, Assad Sabra and Hassan Anise.
According to unconfirmed information from legal sources in Beirut, the indictments accuse the four men of being responsible for the bomb attack.... There were also unconfirmed reports that the special tribunal had identified other possible suspects in addition to the four men named, including individuals of Lebanese, Syrian and Palestinian nationality. An unidentified Lebanese security official told the German news agency DPA that most of the suspects were no longer in Lebanon and "may have fled to Iran after the murder."..."