ATHENS, Greece — Spain and Italy say they are sending navy ships to where a flotilla of boats carrying activists seeking to break Israel’s blockade of Gaza is sailing, after the activists said they were attacked by drones near Greece .

The Global Sumud Flotilla said on Friday it was preparing to set sail on the final leg to Gaza after being targeted by drones and communications jamming, with several explosions occurring on or near some of the boats. Some of the vessels were damaged, but no injuries were reported.

Here's what to know about the flotilla.

The flotilla's goal

Organizers say the flotilla includes 52 mostly small vessels carrying activists from dozens of countries. They are carrying a symbolic amount of humanitarian aid, mainly food and medicine, for Palestinians in the

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