ISTANBUL, Oct 2, 2025 (BSS/AFP) - Turkey's President Recep Tayyip Erdogan on Thursday accused Israel of "brutality" in boarding an aid flotilla that said it was sailing to help Palestinians suffering under the offensive in Gaza.

"This attack by the Israeli government against civilians sailing in international waters has once again shown the madness of its genocidal leaders trying to hide their crimes against humanity in Gaza" and reveals "once again Israel's brutality", Erdogan said in a speech to his AKP party.

Erdogan's criticism came after the Istanbul chief prosecutor's office announced that it had opened an investigation into the arrest of Turkish citizens travelling with the flotilla.

The probe concerns "24 Turkish citizens arrested following the attack carried out by elements of the Israeli navy in international waters against the Global Sumud flotilla", a statement said, according to Turkish media.

It cited the UN Convention on the Law of the Sea and said it would look into "crimes of deprivation of liberty, hijacking or detention of means of transport, aggravated looting, material damage, and torture".

A spokesperson for the flotilla said 48 Turkish citizens were arrested among some 200 activists aboard boats intercepted by Israeli forces.

The Turkish foreign ministry on Wednesday night denounced what it said was "an act of terrorism" by Israel, and "hoped that this attack will not compromise efforts to achieve a ceasefire in Gaza".

The flotilla announced on Thursday morning that it would continue its journey towards the Palestinian territory, despite the interceptions.