Activists will be brought to an Israeli detention center on shore and given a choice of deportation or jail
Israel imposed the blockade on Gaza three years ago, after the Palestinian militant group Hamas seized control of the territory. The aim of the sanctions is to isolate and weaken Hamas, which Israel regards as a terrorist group.
The international activists have rejected an Israeli offer to unload their humanitarian aid at a port in Israel, from where it would be transferred to Gaza via international organizations.
Therefore, Israeli government spokesman Yigal Palmor says the flotilla will be intercepted by the navy.
"The choice is theirs," Palmor said. "If they choose to ignore this offer and to clash, to riot as it were on high sea, then they will have to bear the consequences of this behavior."
The activists will be brought to an Israeli detention center on shore and given a choice of deportation or jail.
But Israel fears a public relations fiasco, and that pictures of naval commandoes confronting unarmed civilians will harm its already tarnished image. So the military is jamming the communications of the flotilla.