Four dead and 40 missing after Russian tower block collapse

Rescuers search for survivors in the rubble as temperatures expected to drop to -23C overnightFour people have been killed and up to 40 are unaccounted for after a gas explosion tore through a residential building in Russia, leaving hundreds without a home in freezing temperatures on New Year’s Eve.A large section of the high-rise building in the industrial city of Magnitogorsk collapsed after the blast at about 6am local time (0100 GMT) on Monday. Magnitogorsk is approximately 1,000 miles