'The Russians just walked in' - Ukrainian troops in Kharkiv tell BBC

"Denys Yaroslavskyi is angry.

As the Commander of a Ukrainian Special Reconnaissance Unit, he fought in Ukraine’s surprise offensive in Kharkiv in the autumn of 2022.....Russian forces have, in recent days, made small but significant gains right along the border in the Kharkiv region.
Their advances are only a few miles deep but have swallowed up around 100km (62 miles) of Ukrainian territory. Denys wants to know what happened to Ukraine’s defenses.
“There was no first line of defense. We saw it. The Russians just walked in. They just walked in, without any mined fields” he says.
He shows me video from a drone feed taken a few days ago of small columns of Russian troops simply walking across the border, unopposed.
He says officials had claimed that defenses were being built at huge cost, but in his view, those defenses simply weren’t there. “Either it was an act of negligence, or corruption. It wasn’t a failure. It was a betrayal”." Ukrin