White House had grown increasingly frustrated by brazen Ukrainian drone attacks that have struck oil refineries, terminals, depots and storage facilities across western Russia, hurting its oil production capacity.

Repeated warnings from Washington were delivered to senior officials at Ukraine’s state security service, the SBU, and its military intelligence directorate - publication citing sources.

An invitation to Ukraine to join NATO would be an invitation to the alliance countries to go to war with Russia. I doubt that public in most European countries is ready for this - Sikorski in another statement sure to piss off Kiev.