At least four people were killed after a gas explosion tore through a residential building in Russia on Monday.<br />''<br />''<br />''A large section of the building in the central Russian city of Magnitogorsk collapsed as a result, leaving hundreds without a home in freezing temperatures.<br />''<br />''<br />''Sixteen people, including seven children, have been evacuated. Nearly 70 people remain unaccounted for. <br />''<br />''<br />''<span style="color: #222222;">Officials warned that two more sections of the Soviet-era building are in danger of collapsing. </span><br />