More than 3 million have fled Ukraine since invasion, authorities say

More than 3 million people have fled Ukraine since Russia launched its invasion, according to new estimates.

A United Nations agency said the milestone had been reached nearly three weeks into the war, which has killed hundreds of civilians, separated families and devastated cities.

It comes after 1 million refugees were estimated to have fled the country in the first seven days.

The figure surpassed 3 million on Tuesday, according to the International Organisation for Migration (IOM), who warned millions more could be affected if the war being waged in eastern Europe continues.

UN officials have called it the largest refugee crisis in the continent since the Second World War.

Out of the 3 million refugees to have fled into neighbouring countries, more than 157,000 of these are not Ukrainian citizens, according to IOM estimates.

Paul Dillion, a spokesperson for the group, said the new figures came from data from national authorities.

The UN Refugee Agency (UNHCR), which provides a more detailed count than the IOM though based on similar data, said more than 1.8 million of the refugees from Ukraine were now in Poland, while hundreds of thousands have gone to Western Europe.

According to the UNHCR, those fleeing early in the conflict mostly had resources and contacts outside Ukraine, but now many of the refugees are leaving in a hurry and more vulnerable.

“We see a lot of elderly people and a lot of persons with disabilities, really people who were expecting and hoping until the last moment that the situation would change,” Tatiana Chabac, a UNHCR aid worker, said.

Matthew Saltmarsh, a UNHCR spokesman, said most of those who have fled the Russian invasion - which started on 24 February - have been women and children.

Men of military age have been prevented from leaving the country.

Others have struggled to leave cities under attack, such as Mariupol where the first successful evacuation convoy took place this week after numerous failed attempts.

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