Nigeria and five other African nations are among the 10 worst in the world to be a child in a war zone, a new report says.

The Save the Children report released Thursday looks at factors including attacks on schools, child soldier recruitment, sexual violations, killings and lack of humanitarian access and is based on analysis by the Norway-based Peace Research Institute Oslo.

“Syria tops the list followed by Afghanistan, Somalia, Yemen, Nigeria, South Sudan, Iraq, Congo, Sudan and Central African Republic,” Associated Press (AP) reported on Friday.

“Almost 360 million children worldwide, or one in six, live in affected areas, the report says. In addition, conflicts are grinding on longer than before,” the news agency reported.

It quoted Tirana Hassan, crisis response director with Amnesty International, as saying: “Crimes involving children are not lesser crimes and need to be pursued with the same vigor that we expect when war crimes are committed. Concern and outrage are not enough.”

AP reported Save the Children as calling on world leaders to do more to hold perpetrators to account.

“Crimes like this against children are the darkest kind of abuse imaginable and are a flagrant violation of international law,” the news agency quoted the aid group’s president and CEO, Carolyn Miles, as saying.