Russian assaults are raising pressure on the strategic eastern logistics hub of Pokrovsk, Ukraine said on Friday, as waves of guided bombs and infantry lead to some of Moscow's largest territorial gains since the spring.

The push is fueling a surge in civilians fleeing, with requests for evacuation in the area increasing about tenfold over the past two weeks, according to a volunteer helping people leave.

Russian forces have been steadily inching forward on several fronts in the eastern Donetsk region, staging particularly fierce attacks near Pokrovsk with Kyiv's troops stretched thin 29 months since Russia's full-scale invasion.