The international flotilla trying to deliver aid to Gaza says unidentified vessels approached some of its boats as it got closer to a zone where Israel has imposed a naval blockade on the war-stricken strip.

The Global Sumud Flotilla consists of more than 40 civilian boats carrying about 500 people, among them parliamentarians, lawyers and activists including Swedish climate campaigner Greta Thunberg. It aims to break Israel's blockade of the Palestinian enclave.

"We continue to sail to Gaza approaching the 120 nautical mile mark, near the area where previous flotillas have been intercepted or attacked," organisers said in a statement.

It was not clear who operated the vessels that approached the flotilla.

A video post on the flotilla's Instagram page said an Israeli military vessel ap

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