Fighting for the eastern Ukrainian city of Sievierodonetsk continues with Russian forces conducting assault operations on Saturday, the General Staff of Ukraine's Armed Forces said on Sunday.

"With the use of artillery, Russian forces carried out assault operations in the area of the city of Sievierodonetsk," the General Staff said in a statement on its Facebook page.

"The fighting continues."

(Reporting in Melbourne by Lidia Kelly; Editing by William Mallard)