Russia says it invaded Ukraine to halt Kyiv's ambitions to join NATO, the U.S.-led defensive alliance, which it saw as a major security threat. It also accuses Kyiv of persecuting ethnic Russians and their culture in Ukraine.

The Russian delegation will include Foreign Minister Sergey Lavrov, presidential aide Yuri Ushakov, Defense Minister Andrei Belousov, Finance Minister Anton Siluanov, and Russian Direct Investment Fund head Kirill Dmitriev.

President Donald Trump on Wednesday threatened "severe consequences" against Russia if Vladimir Putin did not agree to stop the war.