Hundreds of international activists detained during a Gaza-bound aid flotilla have described serious allegations of abuse while in Israeli custody, prompting investigations in several countries.

The activists were part of a flotilla attempting to break the blockade of the Gaza Strip when Israeli forces intercepted their vessels in international waters last month, detaining more than 430 participants from multiple countries.

Several detainees, including French nationals and others from Europe and Australia, alleged they were subjected to violence, humiliation, and degrading treatment during and after the interception. Some said they were forcibly restrained, beaten, denied adequate food and water, and held in overcrowded conditions.

Accounts included claims of physical assault, intimidation, and sexual abuse while being transferred to detention facilities, including Ktziot Prison. Activists described prolonged confinement, harsh conditions, and mistreatment by security personnel.

Israeli authorities, including the military and prison service, denied the allegations, stating detainees were treated appropriately under security procedures linked to the naval blockade enforcement. Officials said the flotilla participants were held in designated secure areas with necessary provisions.

France, Italy, and Australia have opened investigations into the reported abuses, which have sparked international criticism and renewed scrutiny of Israel’s handling of activist flotillas attempting to reach Gaza.