Video from Kupyansk shows a complex Ukrainian ambush on a column of two Russian tanks and two Russian BMPs. None of the vehicles survived the encounter and none of the vehicles fired back.
The ambush was conducted using direct fire (possibly 30mm from Ukrainian BTRs or BMPs), mines, loitering munitions (or drones) and cluster munitions.
My video on how land mines work and how to counter them is below.
Analyzing a Ukrainian Ambush