Greta Thunberg has pushed back on criticism that a Gaza-bound flotilla she is a part of is a publicity stunt, saying no one would imperil themselves purely for attention.

The Swedish activist is aboard one of 52 boats that form the Global Sumud Flotilla (GSF), which is travelling toward Gaza with the aim of delivering humanitarian aid to Palestinians there.

Israeli authorities have ridiculed the GSF flotilla and similar seaborne attempts to reach the territory, calling the boat Thunberg travelled on in June a 'selfie yacht'.

Asked about these criticisms of the flotilla by the BBC's Laura Kuenssberg, the activist said: 'I don't think anyone would risk their life for a publicity stunt.'

Speaking while sailing off the Greek coast, she said the flotilla was not just a humanitarian mission but was also sending a message to people in Gaza that 'when our governments fail to step up, the people will step up.'

International aid agencies have been attempting to get food and medicine into the Palestinian territory - but note Israel is restricting the flow of supplies. Israel claims it is attempting to stop those supplies falling into the hands of Hamas, and has approved a US-backed aid agency.

Last month, a UN-backed body confirmed that there was famine in Gaza and the UN's humanitarian chief said it was the direct result of Israel's 'systematic obstruction' of aid entering the territory. Israeli Prime Minister Benjamin Netanyahu has called this an 'outright lie'.

Thunberg said the purpose of the flotilla was to 'break Israel's illegal and inhumane siege on Gaza by sea'. The Israeli military has long controlled the waters that border Gaza.

Earlier this month, the flotilla came under attack by drones which dropped unidentified objects onto boats outside the Tunisian port of Sidi Bou Said.

Another suspected drone attack on Wednesday, off the coast of Crete, led Spain and Italy to deploy naval ships to assist the flotilla.

Addressing the incidents, Thunberg accused Israeli officials of making 'baseless threats' that violate international law, and asked: 'Why would they attack a peaceful humanitarian mission aiming to bring humanitarian aid to a starving population?'

Israel has not commented on the drone attack, but has previously said it would not let the flotilla reach its destination.

Thunberg and 11 other activists were detained by Israeli authorities in June after they intercepted another boat heading for Gaza with a token amount of aid in the Mediterranean.

She was held in Tel Aviv for a day before being deported to France.

Thunberg accused Israel of illegally kidnapping her and the other activists while they were in international waters. Israel said it had prevented a breach of the maritime blockade around Gaza.

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