Some updates from the Swede Mikael Valtersson on Twitter, quote:
NEWS UPDATE VUHLEDAR MORNING JUNE 5
The fighting rages on in northern Novodonetskoye(2) west of Vuhledar (3), but russian forces are now counterattacking and driving out the ukrainian forces from the northern outskirts of the settlement. Yesterday UkrAF attacked Velikonovoselovka (1) east of Vuhledar and tonight large ukrainian forces gathered again in front of that settlement, making the russians believe that an another attack (A) was about to take place towards Velikonovoselovka.
But that was a diversion as the real attack (B) was instead in the west towards Novodonetskoye. The ukrainian force at Novodonetskoye was initially much smaller than their forces near Velikonovoselovka, but reinforcements has arrived during the night. The UkrAF attack was successful and they broke through the russian lines and entered Novodonetskoye from the north. The russian forces in Novodonetskoye resisted during the night which gave the russians time to gather reinforcement for a counterattack. The last hours the russian counterattack (C) together, with massive shelling of the ukrainian forces, drives the ukrainian forces north towards the old frontline.
ANALYSIS UKRAINIAN OFFENSIVE OPERATIONS JUNE 4
June 4th UkrAF scaled up offensive operations on the Southern Front, but the losses are too high for long time success. Earlier operations were mainly reconnaissance in force with platoon and company sized combat groups. Yesterday the ukrainian forces seemed to be battalion sized combat groups. According to Russian MoD 8 UkrAF battalions was involved in offensive operations SE of Mala Tokmachka (1), at the Vremivka salient (2) and East of Vuhledar towards Velikonovoselovka (3). The fighting was intense, but on most places ukrainian forces was turned back, mainly by intense russian artillery and air attacks. On some places UkrAF succeeded in capturing a couple of hundred meters.
There are two different media stories about the fighting. The ukrainian side is very quiet about both the attacks and eventual losses on their side. Russian sources are much more liberal with information, both in text and videos. IF the russian information is correct, this explains the ukrainian silence, since the ukrainian side seldom concedes major losses on their side and tries to shift attention to other subjects.
According to the russian side, ukrainian losses amount at least 10 tanks, nearly 40 IFVs or APCs and at least 250 eliminated (KIA or very badly WIA). With this number of eliminated, the number of wounded would probably be 750-1000.
Are these numbers true, the prospects for a ukrainian counteroffensive looks very dim. This is even if we don't take into account the ongoing intense russian air and artillery offensive against UkrAF troop concentrations, ammunition and fuel depots.
With losses of over 1000 KIA and WIA that means that a ukrainian brigade of 4000 man loose at least 25 percent of its manpower. That's on the brink of making a brigade unusable. Two days fighting with such losses would destroy a brigades battle capability. 24 days with such losses would in effect destroy the entire fist of 12 brigades UkrAF has gathered for the counteroffensive. With losses of around 12 brigades, 25 000 KIA/WIA, 250 tanks and 1000 IFVs/APCs all the strategic reserves UkrAF has built during the last 6 months would be gone. In exchange the ukrainian side could have advanced maybe 10 km on some places or more generally 2-3 km along maybe half the southern front.
Once again, IF the russian claims are true, RuAF must feel relieved and UkrAF very worried by the results of the fighting on the Southern front June 4th. Map from Institute of War.