The European Union (EU) intends to significantly expand sanctions against Russia in the coming months, EU foreign policy chief Kaja Kallas told a German newspaper, Reuters reports.

"EU sanctions have already cost Russia dearly, depriving Russia's war machine of over €1 trillion ($1.16 trillion) and for autumn I am putting forward the most far-reaching sanctions listings since the start of the war," Kallas told German daily newspaper Die Welt. "Once adopted, they would immediately raise the total number of sanctioned Russian entities by a third. The pressure must keep growing until Moscow ends its war."

But Kallas did not elaborate further on timing or details of the new sanctions package.

The EU in July approved its most recent sanctions package against Russia over the ongoing war in Ukraine, imposing curbs on the country's banking sector and cryptocurrency networks.