MOSCOW — Russian regulators said on Friday that they had averted the collapse of one of the largest Russian banks by providing a bailout package of 395 billion rubles to Bank of Moscow, suggesting the bank’s problems with bad loans were more severe than previously acknowledged.

The bailout, worth $14.15 billion, raised the specter of balance sheet problems at other Russian banks, which had a tendency during the recession to roll over loans to struggling companies, rather than force them into bankruptcy courts.

Officials, though, have tried to characterize Bank of Moscow’s portfolio of bad loans for real estate projects in the capital as a unique problem created by the former mayor of Moscow as he tried to keep politically connected developers afloat during the downturn.

The bailout, announced in a statement on the Russian central bank’s Web site, will provide Bank of Moscow a 10-year loan of 295 billion rubles from a government deposit insurance program at an interest rate of 0.51 percent. The plan calls for a state bank, VTB, which recently bought equity in Bank of Moscow, to contribute an additional 100 billion rubles.