People coming from Ukraine descend from a ferry boat to enter Romania at the Isaccea-Orlivka border crossing at the Danube river.

People coming from Ukraine descend from a ferry boat to enter Romania at the Isaccea-Orlivka border crossing at the Danube river. / Daniel Mihailescu/AFP via Getty Images

Updated February 27, 2022 at 7:28 AM ET

Since Russia's invasion into Ukraine on Thursday, some 368,000 Ukrainians have fled their country, according to the United Nations refugee agency. U.S. officials have estimated that the Russian invasion could produce between 1 million and 5 million refugees.

Satellite images show miles of vehicles attempting to cross into nearby Romania at the Siret border crossing. Poland and Slovakia are also bracing to accept refugees from Ukraine.

"In these tragic times, our thoughts are on the Ukrainian people, on all Ukrainian women, men and children, forced to live in terror, innocent and collateral victims of a war they do not understand and did not want," Romanian President Klaus Iohannis said Thursday.

Conflict in Kyiv intensified overnight into Saturday as Russian forces advanced on the Ukrainian capital. But U.S. officials say Russia has failed to take over any Ukrainian cities so far.

Copyright 2022 NPR. To see more, visit https://www.npr.org.

Satellite images show a 4-mile-long traffic jam of people, cars and trucks trying to leave Ukraine and cross into Romania on Friday near the Siret border crossing.

Satellite images show a 4-mile-long traffic jam of people, cars and trucks trying to leave Ukraine and cross into Romania on Friday near the Siret border crossing. / Satellite image ©2022 Maxar Technologies

Cars wait to cross into Romania at the border crossing in Solotvyno, Ukraine, as the Russian invasion continues.

Cars wait to cross into Romania at the border crossing in Solotvyno, Ukraine, as the Russian invasion continues. / Andreea Campeanu/Getty Images

A woman talks on the phone to organize accommodations in Sighetu Marmatiei, Romania, after having crossed from Ukraine.

A woman talks on the phone to organize accommodations in Sighetu Marmatiei, Romania, after having crossed from Ukraine. / Andreea Campeanu/Getty Images

Ukrainian women holds her child as they wait to enter Romania after crossing the Danube river at the Isaccea-Orlivka border crossing point on Friday.

Ukrainian women holds her child as they wait to enter Romania after crossing the Danube river at the Isaccea-Orlivka border crossing point on Friday. / Daniel Mihailescu/AFP via Getty Images

Ukrainians rest after finally reaching Romania at the Isaccea-Orlivka border crossing. They are among tens of thousands leaving Ukraine.

Ukrainians rest after finally reaching Romania at the Isaccea-Orlivka border crossing. They are among tens of thousands leaving Ukraine. / Daniel Mihailescu/AFP via Getty Images

Sisters embrace after crossing the border from Ukraine in Siret, Romania, on Friday.

Sisters embrace after crossing the border from Ukraine in Siret, Romania, on Friday. / Andreea AlexandruAP

A family walks away from the war-torn Ukraine and into Romania on Friday.

A family walks away from the war-torn Ukraine and into Romania on Friday. / Andreea Campeanu/Getty Images

Tags: Romania  Ukraine