New Delhi, May 26 -- Belarus' exiled opposition leader Sviatlana Tsikhanouskaya visited Kyiv on Monday as the Ukrainian capital cleaned up after Russia's biggest missile attack of the year, and world leaders kept a close eye on how much support the Belarusian government is ready to provide for Moscow's all-out invasion.

Russia and ally Belarus held joint nuclear drills last week, and Ukrainian President Volodymyr Zelenskyy has warned in recent days that Belarus could provide a launchpad for Russia to open a new front in northern Ukraine. Some Russian troops entered Ukraine from Belarusian territory in Moscow's invasion on Feb. 24, 2022.

In a further sign of concern, French President Emmanuel Macron spoke by phone with Belarusian Preside...