Around 20 Gaza fishing boats carrying several dozen activists on Monday claimed to have broken the naval blockade on the territory in a move denied by the Israeli military.
The "resistance flotilla" was at sea for several hours before returning with the claim it had "broken" the blockade which bars fishing vessels from sailing six nautical miles from the shoreline.
Signup to our newsletter and follow us on Facebook and Twitter!
But a military spokesman denied the boats had passed the six-mile mark.
The boats had been aiming to put a new spin on attempts to break the Israeli blockade -- by sailing out of Gaza rather than trying to get in.
Israel first imposed its blockade on Gaza in 2006 when militants there snatched and Israeli soldier.
It was further tightened when Hamas seized control a year later but has since been eased following international pressure, although tight restrictions remain in place, including the fishing limit.