Russia has called on the Ukrainian forces to drop their weapons.
Ukrainian forces in the port city of Mariupol are refusing to stop fighting, after rejecting an offer from Russia to surrender.
Moscow claimed that, if Ukraine's soldiers laid down their weapons, it would allow for the safe passage of civilians out of the besieged city.
Eight so-called safe routes out of Ukrainian cities under attack, open today, however, none of the humanitarian corridors cover Mariupol.
Authorities there say Russian forces bombed an art school where 400 people were sheltering.
While in Kyiv at least four people were killed during a bomb attack which gutted a shopping centre.
However an assessment by British intelligence claims that Russia's advance on the capital city is stalling.
Sky's special correspondent Alex Crawford is on the outskirts of Kyiv, but says the centre itself feels secure.
Washington Post reporter Siobhan O'Grady is in Ukraine and says the situation on the ground in Mariupol is 'dire'.
