UN Secretary General Kofi Annan has appointed a German prosecutor to head the international commission that will investigate the assassination of former Lebanese Prime Minister Rafik Hariri. Detlev Mehlis, the chief prosecutor in the office of the attorney general in Berlin, will be heading a team of some 50 experts due in Beirut early next week to begin the probe.Mehlis is expected to arrive at UN headquarters in New York from Berlin early next week according to UN Spokeswoman Marie Okabe, who added that Mehlis "would go with a team of around 10 experts to begin work." Okabe added the team's initial task would be "assessing the results of all the investigations that have already taken place." The Lebanese and Syrian governments had agreed to an international probe following scathing criticism of both governments in an initial UN fact-finding mission's report, which blamed Syrian military intelligence for what it said was "a lack of security, protection and law and order" in Lebanon at the time of Hariri's death.