INTERNATIONAL: Volunteers across Central Europe have sprung into action on Sunday to help Ukrainians fleeing the Russian invasion, donating mountains of supplies, transporting new arrivals from the border and providing what one official called a "safe second home."

In Romania, soldiers have queued to donate blood, with the bombing intensifying, hospitals are being prepared in Romania and the other countries surrounding Ukraine, from where people continue to flee on the fourth day of a Russian invasion that has pushed nearly 400,000 people to seek safety abroad.

With men of conscription age have prevented from leaving Ukraine, mostly women and children have arrived at the border in eastern Poland, Slovakia and Hungary and in northern and northeastern Romania in the hope of finding safety in what the Polish interior minister said would be a second home.

Central Europeans have sought to do just with volunteers flocking to social media to organize collections, transport, accommodation and any other potential help. Some collection centers had so many offers they had to turn away donations.

At a Warsaw collection center volunteers have sifted through rolls of toilet paper, candles, bed sheets, canned goods and other supplies to prepare care packages while the manager of a nearby hotel has offered accommodation to a group of Ukrainians that included a 14-day old baby.

At borders, authorities set up makeshift reception centers in tents where people could get medical aid and process asylum papers, while thousands of volunteers drove up to the crossings with donations of collected food, blankets and clothes.

In Romania, a Facebook page with 175,000 members generated 10,000 posts in the past 24 hours that allows Ukrainians to request help and volunteers can immediately respond.