A US State Department spokesman says an attack on a team of UN investigators in Beirut was an attempt to disrupt the probe into the 2005 assassination of a former Lebanese prime minister.
The two investigators and their interpreter received medical attention after Wednesday's attack at a private clinic.
The melee underscored the charged emotions behind the international tribunal looking into Rafik Hariri's 2005 assassination. At the State Department, spokesman P.J. Crowley said that efforts to hinder the investigation will only cause instability.
The tribunal has not yet indicted any suspects in the assassination, but speculation that the court could name members of the Hezbollah militant group has raised fears of violence.