Jagath Jayasuriya was commander of the Vanni Security Force Headquarters between 2007 and 2009, one of the bloodiest periods of the 26-year civil war between Sri Lanka and the Tamil rebel group LTTE.
He was commander of all army divisions in the final phase of the conflict and thus allegedly responsible for the shelling of protected objects, including hospitals and persons in no-fire zones, and for torture and sexual violence especially at the detention center known as Camp Joseph, as well as enforced disappearances and extrajudicial killings of surrendered persons by his subordinated forces.
On 28 August 2017, the International Truth and Justice Project filed a complaint in Brazil and in Colombia against Jagath Jayasuriya, then Sri Lankan ambassador to Brazil, Colombia, Peru, Chile, Argentina and Suriname, for his alleged involvement in war crimes and crimes against humanity committed during the final phase of the Sri Lankan civil war. He is accused of having commanded the state armed forces, which allegedly attacked hospitals and committed acts of torture, sexual violence, enforced disappearance and extrajudicial killings in 2009.
On 29 August 2017, Jagath Jayasuriya fled back to Sri Lanka.