By Jennifer Lipman, September 12, 2012
Politicians from around the world have offered condolences to the family and friends of the victims of an attack on US embassy staff in Libya.
The US envoy to the North African country, Christopher Stevens, was killed along three others during a pro-Islamist riot broke in Benghazi on Tuesday night.
President Obama said in a statement that he strongly condemned "the outrageous attack".
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