cameroon
The Cameroon president Paul Biya is yet to react to the reports of violence and clashes.
The country's president confirmed the derailment injured 600 people, as he declared a day of mourning.
Power visited the boy's family and offered her profound condolences.
The project expects to help cut the number of women and babies who die during childbirth by at least 70 percent by 2020.
WHAT'S HAPPENING
These are the people fighting homophobia and transphobia in Africa.
The country is part of a 8,700-strong task force comprising troops of Chad, Niger, Nigeria and Benin, aimed at destroying Boko Haram.
The Nigerian militant group's violence is increasingly spilling over borders, displacing tens of thousands of people.
The forces will be conducting airborne intelligence, surveillance and reconnaissance operations.