KYIV, Ukraine (AP) — Ukraine’s troops have been forced to make a tactical retreat from three villages in the embattled east, the country’s army chief said Sunday, warning of a worsening battlefield situation as Ukrainian forces wait for much-needed arms from a huge U.S. aid package to reach combat zones.

Col. Gen. Oleksandr Syrskyi reported that Russian forces continue to attack “along the entire front line” of more than 1,000 kilometers (620 miles), with pitched battles raging west of Avdiivka, the eastern city they took in February after a grueling, monthslong fight.

“The most difficult situation is in the Pokrovsk and Kurakhove directions, where fierce battles continue,” Syrskyi’s said in an update posted to the Telegram messaging app, referencing two Ukrainian-held cities in the war-torn Donetsk region, once a hub of industry.