Manuel Fontaine, UNICEF's emergency programs director, said it is something he hadn't before seen happen so quickly in 31 years of humanitarian work.
The Europol teams are operating in Lithuania, Poland, Romania, Slovakia and Moldova and are planning to deploy to Romania, too.
Cameroonian advocates have similarly ratcheted up their calls for humanitarian relief, protesting in front of the Washington residence of Homeland Security Secretary.
Since the war began in late February an estimated 3.6 million people have fled Ukraine and millions more have been displaced within the country.
The U.N. refugee agency UNHCR reported Thursday that the daily number of arriving refugees recorded by the countries that border Ukraine dropped below 40,000 on Wednesday.
Vasyl and Marina Prishchak and their three daughters, ages 5, 10 and 16, arrived in Hawaii in the middle of February and had an idyllic, three-week beach vacation.
David Beasley, executive director of the UN World Food Program, told the UN Security Council that already high food prices are skyrocketing.
Since the war began on Feb.24, more than 3.8 million people have fled Ukraine, according to the United Nations' refugee agency.
All lives are equal but some are more equal than the others. Caucasian lives command a larger premium in the outrage market than others.
It has agreed to accept up to 100,000 people escaping from the war and to increase support for Eastern European nations that have taken in most of the people fleeing Russian forces.
Biden said he had hoped to get even closer to the border but was prevented because of security concerns.
The United Nations says that more than 3.6 million people have fled Ukraine since the war started exactly one month ago Thursday.
The children are everywhere, curled up amid suitcases in train stations, humanitarian aid tents, evacuation convoys.
Lyudmyla Denisova, Ukraine's ombudsperson, said 402,000 people, including 84,000 children, have been taken against their will.
The United Nations says that more than 3.6 million people have fled Ukraine since the war started one month ago in what is the biggest movement of people in Europe since World War I.