Details coming; the building is buring from the top down; 3000 rooms- all being evacuated.
Kyra Phillips on CNN said the hotel is known for "musician" Lance Burton. He's a magician.
Las Vegas Review-Journal: http://www.lvrj.com/breaking_news/14369312.html
MGM-Mirage owns the hotel, which has recently undergone renovations. Early speculation is centering around the roof, or some of the penthouse suites as a potenial starting point for the fire.
Monte Carlo website: http://www.montecarlo.com/
2:52pm: No injuries reported at this time. Updated 3:17: No "major" injuries reported.
Hotel is officially closed until further notice- if you have future reservations, call the hotel: