“Only 3 tanks destroyed in the images...”
There are a great many more images of the aftermath of this battle available on the interwebs. Many, many more than 3 tanks were destroyed. It actually looks like dozens were abandoned intact on the far side of the river when the Russians withdrew after the bridge was blown, because they had no means to take them back across.
Looks like more than one Mechanized Infantry Brigade, possibly even 2 or 3 mixed and thrown together to make a fighting force.