MOSCOW, May 12 - At least 220 Russian soldiers have been killed in east Ukraine, opposition activists said on Tuesday in a report offering what they called "ample evidence" to rebut President Vladimir Putin's denial his troops are fighting there.

The report, the last project of murdered Kremlin critic Boris Nemtsov, also said Russia had spent more than 53 billion rubles ($1.04 billion) in 10 months to fund the conflict and deprived people of 2.75 trillion rubles of money lost to inflation.