Two Russian billionaires, Mikhail Fridman and Oleg Deripaska, called for an end to the conflict triggered by President Vladimir Putin's assault on Ukraine, with Fridman calling it a tragedy for both countries' people.
Billionaire Fridman, who was born in western Ukraine, told staff in a letter that the conflict was driving a wedge between the two eastern Slav peoples of Russia and Ukraine who have been brothers for centuries.
