In April 1988, a bloody hostage taking took place on Ouvéa. Four gendarmes were killed and twenty-seven were held hostage in a cave by supporters of FLNKS. Twelve of the captured gendarmes were released after a while, but six members of a French anti-terrorist squad were also taken hostage. When negotiations to release those taken hostage did not succeed, French security forces besieged the cave and freed the hostages. Eighteen Kanaks and two gendarmes were left dead, and in the aftermath, it was alleged that three Kanaks had been executed or left to die after being arrested.