As losses mount, the pace of Russia's advance has at times been slower than the Battle of the Somme during World War I, a report says.

By Gram Slattery and Humeyra Pamuk WASHINGTON, Jan 30 (Reuters) - U.S. and European officials are growing increasingly worried as hundreds of millions of dollars in U.S. energy assistance previously pledged for Ukraine remain unreleased,

A new report warns that the number of soldiers killed, injured or missing in Russia's war in Ukraine could reach 2 million by spring

Ukraine faces serious new nuclear-safety risks as a result of Russian strikes aimed at degrading its power grid, depriving the nation’s three operating atomic plants of stable electricity feeds.

The train had been operating from Chop, near Ukraine‘s western borders with Hungary and Slovakia, to the town of Barvinkove.

The swift advance of Moscow’s forces into the town of Huliaipole showcases a central challenge for Kyiv: how to defend 700 miles with too few troops.

WASHINGTON, Jan 28 (Reuters) - There is active work under way to reconcile the territorial issue of Donetsk at U.S.-mediated talks to end Russia's war in Ukraine, U.S. Secretary of State Marco Rubio said on Wednesday,