The U.N. Security Council voted unanimously Thursday to authorize an international investigation into the assassination of former Lebanese Prime Minister Rafik Hariri.
The resolution -- co-sponsored by the United States, France and Britain -- urged the independent commission to complete its work in three months, but it also gave Secretary-General Kofi Annan authority to extend its mandate for an additional three months if necessary.
The Feb. 14 bombing that killed Hariri caused an uproar in Lebanon, sparking massive anti-Syrian street protests.
The Lebanese opposition claimed Syria orchestrated the killing. Syria denies any involvement.