New Delhi, Aug. 3 -- US President Donald Trump's special envoy, Steve Witkoff, is set to visit Moscow on Sunday in a bid to secure a breakthrough in negotiations over the Ukrainian conflict, RT reported, citing US Ambassador to NATO Matthew Whitaker.

"I'm hoping he can have a breakthrough," Whitaker told WHO 13 News, referring to Witkoff's upcoming visit to Russia, according to RT. The special envoy has previously held several meetings with Russian President Vladimir Putin during earlier diplomatic efforts.

Trump has also announced Witkoff's planned visit to Russia, though no specific timeline was given, RT reported.

Whitaker further stated that the US intends to sell weapons to NATO allies, who would then provide them to Ukraine to fa...