U.S. Treasury Secretary Janet Yellen said on Tuesday that the G7, a group of seven major industrialized countries, is “urgent” to seize about $285 billion worth of Russian frozen assets and move the funds to Ukraine.

There is growing pressure on the United States and Europe to use these funds. While Yellen said there was no “preferred strategy” to address the issue, she added that the G7 accounts for more than half of the global economy and all actions should be taken together.

Yellen told a news conference in Sao Paulo, Brazil, that the United States and its allies are evaluating ways to transfer assets and the risks associated with using them. G7 leaders asked for a solution in June.

“It is necessary and urgent for our coalition to find a way to unlock the value of these fixed assets to support Ukraine’s continued resistance and long-term reconstruction,” Yellen told reporters in Brazil.

Yellen made the remarks before the G20 summit of the 20 largest economies is scheduled to meet on Wednesday and Thursday to discuss the issue. G7 officials said they would meet on the sidelines of the Brazil meeting to discuss ways to support Ukraine.

While many have been calling on the West to move frozen funds to Ukraine, some worry that such action against Russia would harm currencies such as the dollar, euro or yen.

Yellen echoed those concerns, calling a major shift in the currency “extremely unlikely,” citing the unique nature of the situation.

She added that there were “strong international legal, economic and moral reasons to move forward” in reorienting the assets, which would show Russia that Ukraine’s allies are steadfastly united.

She also said strong joint action could incentivize Moscow to pursue peace talks with Ukraine, which needs about $486 billion to recover from the war.

This report contains information obtained from Reuters and AFP.