Russian side had not guaranteed a truce, according to Ukrainian Deputy Prime Minister Iryna Vereshchuk.

In consequence to that, the evacuation corridor for Mariupol was not opened on Sunday.

“We could not open humanitarian corridor for Mariupol, as Russia did not confirm the guarantee of a ceasefire regime,” Vereshchuk said.

“We will try again tomorrow,” she added.

Vereshchuk voiced optimism that the UN would be able to facilitate a humanitarian evacuation, adding, she believed the UN should have been and should be the most successful now.

The UN Secretary-General, António Guterres, is scheduled to visit Moscow on April 26.

They are no longer begging; demanding that the UN establish a ceasefire regime and establish a humanitarian corridor from Azovstal.

It’s critical to stress this, particularly from Mariupol, because there are currently 1,000 women and children in Azovstal.

Plus, there are 500 or more wounded, 50 of whom require immediate medical attention.

Guterres is scheduled to visit Moscow on Tuesday.

According to a UN spokesman, the UN Secretary-General will also travel to Ukraine next week, where he will meet with President Zelensky on Thursday.

On Sunday, the ICRC stated that “rapid and unhindered humanitarian access” to the besieged Ukrainian city of Mariupol is “urgently required.”