The Russian army announced Monday that it would open several humanitarian corridors in Ukraine. Russian forces pummelled Ukrainian cities from the air, land and sea, with warnings they were preparing for an assault on the capital Kyiv, as terrified civilians failed for a second day to escape besieged Mariupol.

A civilian disaster is growing in Ukraine as attempts to evacuate residents of besieged port city Mariupol failed for a second consecutive day.

Ukraine’s President Volodymyr Zelensky warned Sunday that Russian forces are preparing to bombard Odessa, the historic port city on the Black Sea coast.

More than a million refugees have crossed the border from Ukraine into Poland since Russian troops invaded on February 24, Polish border guards said on Sunday. The UN said earlier on Sunday that more than 1.5 million people have fled Ukraine into neighbouring countries since the Russian invasion.

Turkish President Tayyip Erdogan urged his Russian counterpart Vladimir Putin on Sunday to declare a ceasefire in Ukraine, open humanitarian corridors and sign a peace agreement, his office said.

The United States is considering sending planes to Poland if Warsaw decided to send fighter jets to Ukraine, US Secretary of State Antony Blinken said.

Zelensky said on Sunday he spoke by phone with his US counterpart Joe Biden to discuss financial support and sanctions against Russia.

Delegations from Kyiv and Moscow are set to hold a third round of negotiations on Monday.

The UN Security Council will hold an emergency meeting Monday on the humanitarian crisis triggered in Ukraine by the Russian invasion and discuss a possible draft resolution.

Washington has seen “very credible reports” that Russia has committed war crimes during its invasion of Ukraine, particularly in attacking civilians, US Secretary of State Antony Blinken said Sunday.

Reported by France 24