Amnesty International has called on NATO to investigate civilian deaths from its bombing campaign in Libya last year.
The human rights group said it had evidence that 55 civilians, including 16 children and 14 women, were killed in air strikes.
It acknowledged NATO tried to minimise civilian deaths, but said it must compensate families of those killed.
NATO said it had looked into all credible reports of civilians being harmed, and would continue to do so.
Amnesty issued its report on the anniversary of the start of the NATO bombing campaign against Col Muammar Gaddafi's forces, acting under a UN mandate to protect civilians.