Samantha Power's a U.S. Ambassador hits n kills a young boy in Africa

A top U.S. diplomat has expressed her "great sorrow" after a vehicle in her convoy struck and killed a young boy during an official visit to Cameroon.

Samantha Power, the U.S. ambassador to the United Nations, was traveling to a refugee camp in northern Cameroon when the child was struck Monday, she said hours later in Maroua, capital of the country's Far North Region.

The 8-year-old boy crossed the road without looking near the city of Mokolo, Cameroon's Ministry of Defense said, citing local journalists traveling with the convoy.

The ambassador was not in the car that struck the boy, the ministry said.

The child received immediate care from an ambulance traveling with the group but died shortly afterward, Power said.

The diplomat said she and other U.S. and Cameroonian officials visited the boy's family following the accident to "offer our profound condolences and to express our grief and heartbreak over what the family is going through."

Power is traveling with U.S. Department of Defense and U.S. Agency for International Development officials on a weeklong trip to Cameroon, Chad and Nigeria to underline American support for the campaign against Islamist terror group Boko Haram.