U.S. envoy Steve Witkoff will meet Russian officials in St. Petersburg on Oct. 21 to discuss European and U.S. proposals for peace in Ukraine, Norwegian Prime Minister Jonas Gahr Store said.

"I think the important takeaway for you is that there has not been some deliberate political directive to go out and harm Ukraine," Rubio said, acknowledging possible delays in interceptor shipments.

Lithuania said the drone entered its airspace from the Polish side before exploding on its territory on Oct. 18. Ukraine linked the incident to Russian jamming.

Norwegian Prime Minister Jonas Gahr Store and Finnish President Alexander Stubb are also taking part in the talks.