In a call with reporters, Kremlin spokesperson Dmitry Peskov said Russia made bond payments due in May but the fact they had been blocked by Euroclear because of Western sanctions on Russia was "not our problem".
Russia has struggled to keep up payments on $US40 billion of outstanding bonds since its invasion of Ukraine on February 24, as sweeping sanctions have effectively cut the country off from the global financial system and rendered its assets untouchable to many investors.
Russia has long said it has the money to pay, calling the default artificial as sanctions block foreign bondholders from receiving the cash. On Monday, a US official said the default showed how dramatically the sanctions were impacting Russia's economy.
Around a half of Russian gold and foreign exchange reserves - some $US300 billion - were earlier blocked by western sanctions imposed after Moscow sent troops to Ukraine.
"Our position is well known. Our reserves are blocked unlawfully and all attempts to use these reserves will also be unlawful and would amount to outright theft," Peskov said.
Euroclear did not immediately respond to a request for comment.
In another step to widen sanctions on Moscow, the British government said on Sunday that Britain, the United States, Japan and Canada would ban new imports of Russian gold.
When asked if Russia would be able to re-direct its gold to Asia where the main consumers are located, Peskov said that the global precious metals market is "quite large."
"As with all other goods, of course, if one market loses its appeal, there is a redirection to where conditions are more comfortable," Peskov added.
