The U.N. refugee agency says 1 million people have fled Ukraine since Russia’s invasion less than a week ago, an exodus without precedent in this century for its speed.

The tally from UNHCR amounts to more than 2 percent of Ukraine’s population on the move in under a week. The U.N. agency has predicted that up to 4 million people could eventually leave Ukraine but cautioned that even that projection could be revised upward. 

UNHCR spokesperson Shabia Mantoo said Wednesday that “at this rate” the outflows from Ukraine could make it the source of “the biggest refugee crisis this century.”

On March 1, dozens of self-identified right-wing nationalists marauded through the city center of Przemysl, Poland, and harassed refugees who looked to be people of color, the witnesses said. Many non-white refugees have arrived in the city while they evacuate Ukraine.

As this humanitarian crisis goes on, many fear extremism will continue to cause trouble for refugees of color trying to escape the war.

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