MI 6 or M 16 ?

Have anybody read Today's Deshabhimani [22/02/10] daily . There is a front page factual error given in it . Sorry for not giving the link , as I am not efficient that Tech works .

But there given clearly that netanyahu orderd the killing of top Hamas leader in Dubai . In it , Deshabhimani reports qouting ' Daily mail ' that British agency

M16 given prior details of the murder & trial of it to the Israel agency Mossad .

But my simple question is , whether it is MI 6 or M16 ? (em ai six or em sixteen ) ?

Proof reader should consider this also .

Readers please say your opinion , my connection has errors - so not in Malayalam .