ATHENS, Greece - Pro-Palestinian activists say two Canadians and an Australian linked to a flotilla that seeks to leave Greece for the Gaza Strip have been detained.

David Heap, a spokesperson for a boat carrying dozens of Canadians that tried to leave Greece despite a ban, said Tuesday the three activists could face charges. He identified them as Canadians Sandra Ruch and Soha Kneen, and Australian Michael Coleman.

The boat tried to leave the southern Greek island of Crete on Monday, but was forced to turn back by Coast Guard vessels.

The American captain of a flotilla boat carrying US activists was arrested in a similar incident Friday.