Nato has hit back at a report urging the alliance to investigate fully the deaths of civilians in air strikes in Libya last year. Human Rights Watch (HRW) said at least 72 civilians had been killed in the strikes and the bloc needed to bear responsibility where appropriate.
But Nato's spokeswoman said the campaign was conducted "with unprecedented care and precision".
She said Nato "did everything possible to minimise risks to civilians".
"But in a complex military campaign, that risk can never be zero," spokeswoman Oana Lungescu acknowledged.
She added that the alliance "looked into each credible allegation" of harm to civilians and "confirmed that the specific targets struck by Nato were legitimate military targets".
Aircraft from the US, the UK and France conducted most of the 9,658 strike sorties last year, targeting forces loyal to Libyan leader Col Muammar Gaddafi.
The point of the Nato air campaign in Libya last year was to protect civilians, so how many innocent people died is still a sensitive issue, BBC diplomatic correspondent Bridget Kendall reports.