On Wednesday, Pentagon chief Lloyd Austin said: “We have full confidence in the Polish government‘s investigation of this explosion, and they‘ve been conducting that investigation in a professional and deliberate manner, and so we won‘t get ahead of their work. And we‘re going to stay in close touch with our Polish counterparts, as well as with our NATO allies and other valued partners”. He added that regardless of the final results of the investigation, the ultimate blame for the incident lies with Russia.