[I heard it took place yesterday. Except nobody has seen it.]
Ukies denied it. That was the Pentagon jumping the gun. They’ve presumably hoovered up a bunch of sigint and visual cues about current battlefield developments on both sides. So far, apart from Milley’s view that Kiev would fall in 72 hours, Pentagon projections have been pretty accurate - including the one that Putin was poised to invade, despite denial after denial by Russian government spokespeople.