The much anticipated media briefing with Acting Commissioner of Police, Mc Donald Jacob and Gary Griffith has been cancelled until further notice. TTT News spoke with Mr. Griffith who said the Police Service Commission submitted correspondence to both men giving clearance for the media conference to be held today, Saturday to clarify matters currently in the public domain. But Acting Commissioner Jacob said on Friday evening he did not sanction the news release issued by the Trinidad and Tobago Police Service , inviting the media to the news conference.