Ukraine invasion: Russian ground forces cross into Ukraine: guards

Hours after Russia attacked and says it 'eliminated' Kyiv air defence systems, Ukraine border guards say Russia's ground troops and tanks have crossed into the country from several directions.

KYIV, UKRAINE - FEBRUARY 24: Inhabitants of Kyiv leave the city following pre-offensive missile strikes of the Russian armed forces and Belarus on February 24, 2022 in Kyiv, Ukraine. Overnight, Russia began a large-scale attack on Ukraine, with explosions reported in multiple cities and far outside the restive eastern regions held by Russian-backed rebels. (Photo by Chris McGrath/Getty Images)

Vladimir Putin has declared war on Ukraine in what the Kremlin has called a “special military operation”, warning foreign nations to keep out of the way or endure “consequences as [they] have never experienced”.