On a recent evening in March, Bohdan Tymchenko, a quiet and unassuming man from Bucha, logged on to his computer to play the popular video game World of Tanks. Less than two weeks later, he planted two bombs outside his flat.
What unfolded in the intervening days offers a stark glimpse into a growing pattern: Ukrainians drawn in online by Russian intelligence services, promised money or coerced into carrying out sabotage attacks against their own country.