article_snippet.sent: Meanwhile, four Britons who were detained . in Turkey on suspicion of trying to cross illegally into Syria . were arrested on four Britons who were detained .
article_snippet.sent: in Turkey on suspicion of trying to cross illegally into Syria return to England yesterday, police . said.
article_snippet.sent: Turkish and other security services estimate some 600 are .
article_snippet.sent: About half of the 600 are thought to have returned home.