Vatican City, March 11 - The Vatican said on Monday that a new pope was unlikely to be elected on Tuesday. Observers waiting to see if Benedict XVI's successor has been elected by cardinals will most probably see "black smoke" at the end of the first day of the conclave on Tuesday, signaling that electors have yet to choose the new pontiff. "It is difficult that a positive result will come from the first day of voting," Vatican spokesman Father Federico Lombardi said. Smoke that lets the world know whether the cardinals have elected a new pope is white, while black smoke means that no decision has been made. Lombardi also noted that in 2005 when Benedict XVI was elected the smoke signaling the conclave's decision, after two days of talks, came late, after 20.00.