tournament rule question

[bdawg31]

I was having a discussion about this rule question with someone and was wondering if anyone knew the answer. I vaguely remember watching the WSOP last year and a player saying that you are not allowed to announce verbally what you have in your hand while the hand is live - for example, if I go all-in with AK and someone is thinking and i say "I have AK". The player implied that you can not actually say what you have in your hand (tell the truth). I got the impression you can say things like "I am pretty strong..." or "Be careful here...." but you could not actually announce your hand - i.e. "I have AK suited" or if its after a flop you couldn't say something like "I have two pair - be careful".

I guess I wouldn't mind what people thought was the rule for a cash game as well - but I was more interested in what the rule is (if there is a rule) for a tournament.

BTW - i dont need a debate on why someone would or would not want to do this - i just want to know if its allowed or not.