Israeli authorities are defying international criticism of last week's raid on the Gaza aid flotilla, in which nine people were killed.
They are now claiming that five passengers on board the Mavi Marmara were "active terrorists".
Israel's "terrorist" list includes two Turks, one French, and two US citizens.
Ken O'Keefe, a former US marine, who is on the list, is accused of being a "radical anti-Israel activist" whom the Israelis say wanted to "train a commando unit" for Hamas.
But speaking to Al Jazeera's Veronica Pedrosa, O'Keefe denied the allegation.
[7 May 2010]