Fighting on the frontline: The heroes of Ukraine | IN PICS

A Ukrainian serviceman walks past the wreck of a Russian tank in the village of Lukyanivka outside Kyiv, as Russia's invasion of Ukraine continues.

A Ukrainian serviceman stands near the wreck of a Russian tank on the front line in the Kyiv region.

A Ukrainian serviceman stands on top of a Russian tank captured after fighting with Russian troops in the village of Lukyanivka outside Kyiv.

Ukrainian service members walk on the front line near Kyiv as Russia's invasion of Ukraine continues.

Ukrainian service members walk at a position on the front line in the Kyiv region.

A Ukrainian service member walks on the front line near Kyiv as Russia's invasion of Ukraine continues.

A Ukrainian service member looks at a toy machine gun inside a house that the residents left.

Ukrainian serviceman stands in the village of Lukyanivka outside Kyiv, as Russia's invasion of Ukraine continues.