It was a massacre that shocked the world's humanitarian community.
Seventeen aid workers were killed outside their office in Sri Lanka's northeast - executed at point-blank range with automatic weapons in one of the worst attacks on humanitarians.
A decade on, justice remains elusive for families of the victims, all Sri Lankan nationals, says Action Contre La Faim (ACF), the charity where they worked.
"Our colleagues, four women and 13 men, were deliberately executed although they were clearly identified as humanitarian aid workers. It was an unprecedented massacre in the humanitarian sector, constitutive of a war crime," said Pauline Chetcuti, ACF's Head of Humanitarian Advocacy and Policy.