Suspicions of foul play deepened when the opposition's second-leading figure, Yuliya Tymoshenko, a former deputy prime minister, was summoned by a Moscow prosecutor to answer questions related to charges that years ago she bribed a Russian military officer to benefit the gas firm she headed. Indeed, Russia's military prosecutor has now issued an international arrest warrant for her, even though the officer she is accused of bribing was acquitted in a trial in Moscow last year of the very charges that prosecutors now want to question her about.