The BBC's Jonah Fisher in Lviv says that as Russia's military advance comes to a halt, Moscow may be moving into a new phase of the war where its forces try to bomb Ukraine "into submission".
Speaking from the western Ukrainian city, Fisher told BBC Breakfast that Russian forces have "effectively ground to a halt" in most parts of Ukraine.
"It does appear now that the Russians are shifting focus from trying to move vehicles and tanks and armour in on the ground to instead shelling and targeting cities from the air. We've seen that in Mariupol, we've seen it in Kharkiv and we've seen it to a certain extent in Kyiv as well," Fisher said.
Meanwhile, the BBC's James Waterhouse in Kyiv says the war could be entering "a deadly holding pattern".
Speaking from the capital city, Waterhouse said Russia's failure to gain control of the Ukrainian airspace and intense resistance from its troops has forced its Moscow to re-evaluate their advance and resort to broad bombardments of cities from afar.
"The other problem they're facing is they're spreading themselves too thin," Waterhouse said. "Even if Mariupol was to fall in the south-east, the cost of that for the Russians, because of the level of Ukrainian resistance, means that they won't be able to keep pushing forward."
"We understand they've shelved plans for now to try and advance on the southern city of Odesa, another significant strategic location," he added.
"That's why the worry is here in Kyiv that troops... will resort to getting in positions where they can bombard the city like we've seen elsewhere because they don't currently have the numbers to surround it."
