Actor Ed Harris was held by police yesterday after he was caught carrying a lock-knife onto a plane.

An airport source told the Daily Mirror: "Ed Harris landed himself in hot water because he made such a fool of himself. He was affronted that security officers dared to ask him to empty his pockets as he went through a checkpoint near passport control."

The Truman Show star allegedly threw his keys and coins on a table in front of security staff before the weapon was found.

The source added: "He was taken away and only then did he realise the full seriousness of what was going on.

"I don't think he will be quite so arrogant or stupid when flying in future."

Harris missed his original flight, but was released by police after a couple of hours, once they established he posed no threat to the public.