HOPING to speed up its work, the United Nations tribunal, which is trying suspects in the 1994 Rwandan genocide of nearly 800000 opened a third courtroom on Monday and swore in three new judges. The new chamber, in Arusha, Tanzania, will help “bring to justice those who committed heinous crimes in Rwanda,” said tribunal spokesperson Kingsley Mogahlu. The addition of three judges brings to nine the number serving the tribunal, established in November 1994. Rwandan authorities and human rights groups have accused the court of incompetence. It won its first conviction in May when a former Rwandan prime minister pleaded guilty and reached its first verdict in September — nearly four years after its creation. Courts in Rwanda itself have already sentenced many to death, while close on 100000 suspects await trial.