Prosecutors say Ulyukayev first approached Sechin on the sidelines of an international summit in India for a payoff to approve Rosneft’s purchase of Bashneft PJSC, a regional oil company Russia seized from billionaire Vladimir Evtushenkov in 2014 after he was hit with money-laundering charges that were later dropped. This led to Ulyukayev’s arrest in a November 2016 sting at Rosneft’s Moscow headquarters organized by Sechin, a veteran of military intelligence who’s worked for Putin since the 1990s.