MOSCOW—Russia may reconsider its $15 billion bailout offer to Ukraine if the current government is removed, a senior official said Tuesday, hours after Ukraine's prime minister offered his resignation in an effort to calm a growing protest movement.

"There is no decision yet, but it is self-evident," that further distributions of the loan would be reviewed if the government of Mykola Azarov was to be dissolved, the official said speaking on condition of anonymity.

...