Ukraine war: Mariupol defenders will fight to the end says PM

Defenders of the besieged city of Mariupol will fight to the end against Russian forces, Ukrainian Prime Minister Denys Shmyhal says.

The port city has not fallen despite an ultimatum from Moscow to remaining fighters to give up, he said.

Ukraine's Foreign Minister Dmytro Kuleba said Russia has chosen to raze Mariupol to the ground.

Local officials said Russian forces have announced they will stop anyone from entering or leaving the city.

Capturing the whole of the city is seen as a major strategic prize for Russia, leaving it in control of a vast swathe of southern and eastern Ukraine.

An advisor to the mayor of Mariupol said residents would be forced to queue for a pass to enable them to move between districts and some could have their phones confiscated or be taken against their will to Russia.