Mariupol besieged but not fallen: Ukrainian PM

"There [are] still our military forces, our soldiers, so they will fight until the end," said Ukrainian Prime Minister Denys Shmyhal.

Ukrainian Prime Minister Denys Shmyhal said Sunday in an exclusive interview with ABC "This Week" that the besieged city of Mariupol has not yet fallen despite Russian demands that Ukrainians surrender.

"There [are] still our military forces, our soldiers, so they will fight until the end," Shmyhal told "This Week" Anchor George Stephanopoulos.

Mariupol is a strategic city for Russia because it would allow Russian forces in the south to connect with troops in the Donbas region. It would also give Russia a key port.

Shmyhal said even though the city remains in Ukrainian control, its residents are suffering.