The announcement came after two days of failed ceasefires to let civilians escape the besieged city of Mariupol, where hundreds of thousands of people are trapped without food and water, under relentless bombardment and unable to evacuate their wounded.
The new "corridors" would be opened at 10 am Moscow time (8pm NZT) from the capital Kyiv and the eastern cities of Kharkiv and Sumy, as well as Mariupol, Russia's defence ministry said.
According to maps published by the RIA news agency, the corridor from Kyiv would lead to Belarus, while civilians from Kharkiv would be permitted to go only to Russia. Russia would also mount an airlift to take Ukrainians from Kyiv to Russia, the ministry said.
"Attempts by the Ukrainian side to deceive Russia and the whole civilised world ... are useless this time," the ministry said.
A spokesperson for Ukrainian President Volodymyr Zelenskiy called the move "completely immoral" and said Russia was trying to "use people's suffering to create a television picture".
"They are citizens of Ukraine, they should have the right to evacuate to the territory of Ukraine," the spokesperson told Reuters.
"This is one of the problems that is causing the humanitarian corridors to break down. They seem to agree to them, but they themselves want to supply humanitarian aid for a picture on TV, and want the corridors to lead in their direction."
Russia's invasion has been condemned around the world, sent more than 1.5 million Ukrainians fleeing abroad, and triggered sweeping sanctions that have isolated Russia in a way never before experienced by such a large economy.
Russia denies deliberately targeting civilians. It calls the campaign it launched on 24 February a "special military operation" to disarm Ukraine and arrest leaders it calls neo-Nazis. Ukraine and its Western allies say this is a transparent pretext for an invasion to conquer a nation of 44 million people.
Oil prices soared to their highest levels since 2008 in Asian trade after the Biden administration said it was exploring banning imports of Russian oil. Russia provides 7 percent of global supply and Russian oil accounts for about 8 percent of US crude imports.
Japan, which counts Russia as its fifth-biggest supplier of crude oil, is also in discussion with the United States and European countries about possibly banning Russian oil imports, Kyodo News reported on Monday.
Europe relies on Russia for crude oil and natural gas but has become more open to the idea of banning Russian products, a source familiar with the discussions told Reuters.
The general staff of Ukraine's armed forces said Russian forces were "beginning to accumulate resources for the storming of Kyiv", a city of more than 3 million, after days of slow progress in their main advance south from Belarus.
While Russia's advance in the north on Kyiv has been stalled for days with an armoured column stretching for miles along a highway, it has had more success in the south, pushing east and west along the Black and Azov Sea coasts.
About 200,000 people remained trapped in Mariupol, most sleeping underground to escape more than six days of shelling by Russian forces that has cut off food, water, power and heating, according to the Ukrainian authorities.
About half of the people in the city were due to be evacuated on Sunday, but that effort was aborted for a second day when a ceasefire plan collapsed as the sides accused each other of failing to stop shooting and shelling.
Ukrainian authorities said on Monday the southern city of Mykolayiv was being shelled. Zelenskiy has warned that Russia's next big target could be Odessa, an historic Black Sea port of 1 million people.
Photo: AFP Caption: Ukrainian refugees walk a bridge at the buffer zone with the border with Poland in the border crossing of Zosin-Ustyluh, western Ukraine on 6 March, 2022.