Ever since its full-scale invasion of Ukraine, experts say Russia has stepped up its hybrid war on Western Europe. Attacks on critical infrastructure or using drones to shutdown airports are meant to undermine support for Ukraine.

U.S. President Donald Trump says President Vladimir Putin has agreed to temporarily halt the targeting of the Ukrainian capital and other towns as the region suffers under bitterly cold temperatures.

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.