They were Russian tanks, the props were the articles and destruction that purported to show Russian tanks:
The convoy wasn't attacked for weeks after it reached Bucha, the Russians held the airfield outside kivv, Antonovsky, from the first days untill they moved out at the end of march, without any offensive operations by the Ukretards, the same for Sumy region. The Russians in Bucha got shelled after 2-3 weeks of holding Bucha without any incident, and the satellite imagery showed the convoy being intact the whole time.