The US ambassador to the UN has expressed her "great sorrow" after her motorcade accidentally hit and killed a seven-year-old boy in Cameroon.
Samantha Power was in Cameroon to show US support for the campaign against militant Islamist group Boko Haram when the accident happened on Monday.
She said she met the boy's family to offer "profound condolences".
An armoured jeep knocked the boy as he tried to cross a road when the convoy was heading towards a refugee camp.
"Although the boy received immediate medical care from an ambulance in our convoy, he died shortly thereafter,"
Ms Power said.