Maybe. But... After just a few days of this warning, ukrainians bombed Donetsk with british missiles and a few days later than that, they bombed Belgorod with American ammunition. In the second case Russians said it was a tochka-u but it was a russian lie that it was a tochka-u and two days later it was revealed it was american ammunition. I think i might find these if you want but look also yourself. So... The warning was another russian red line crossed by the west. That being said, the Russians still may retaliate as they did with the invasion. If you remember, USA said that Russia will invade Ukraine at 16 of February (because they knew that at this date the Ukrainians would start to bomb Donetsk again). Russians didn't invade right after that, but they eventually invaded a few days later, so who knows what is going to happen.