The victims include five people under the age of 18 -- three girls and two boys - and an adult woman who accompanied her daughter to the concert.
Next weekend's season-opening MotoGP race in Qatar has been cancelled because of travel restrictions on passengers from Italy and elsewhere due to the coronavirus epidemic, MotoGP said on Sunday. The floodlit night race was scheduled for the Losail circuit on March 8.
Hurricane Matthew, the fiercest Caribbean storm in nearly a decade, strengthened as it barreled toward the southeastern United States after killing at least 140 people, mostly in Haiti.
Italian Prime Minister Matteo Renzi has declared a state of emergency.
Rescuers were working through the night to pull survivors from the rubble and "won't slow down".