An Egyptian-born Australian policeman is to head investigations for a UN special tribunal to try suspects in the killing of ex-Lebanese PM Rafik Hariri.

The police officer, Nick Kaldas, is an Arabic speaker who is deputy police commissioner and counter-terrorism chief in the state of New South Wales.
In the past five years, he has also spent time in Iraq advising police and the judicial authorities there.
Hariri and 22 others were killed by a massive truck bomb in Beirut in 2005.
Kaldas, 51, will start work at the Dutch-based Special Tribunal for Lebanon in March next year.
He described his appointment as a ""great honor"".
""Working for the UN is the closest a police officer could come to representing their country, so it is a role I take on with a great sense of responsibility.
""It will be a major challenge,"" he told the Australian newspaper The Age.
(Source: BBC)