Two million people — half of them children — have fled Ukraine in the less than two weeks since Russia invaded the country, officials said Tuesday, as Europe's worst refugee crisis since World War II grows by the day. As the cross-border exodus from Ukraine continued, the humanitarian...

LONDON (AP) — Russia’s attack on a nuclear power plant in Ukraine has revived the fears of people across Europe who remember the 1986 Chernobyl disaster, which killed at least 30 people and spewed radioactive fallout over much of the Northern Hemisphere. The U.N nuclear energy watchdog...

KYIV, Ukraine (AP) — Russian forces battled for control of a crucial energy-producing city in Ukraine's south on Thursday and gained ground in their bid to cut off the country from the sea, as Ukrainian leaders called on citizens to rise up and wage guerrilla war against the invaders. The...

WASHINGTON — The Pentagon has established a channel of direct communication with the Russian ministry of defense to avoid unintended conflict related to the war in Ukraine. A U.S. defense official said the “de-confliction line” was established March 1 “for the purpose of preventing...