 Complete the following phrase:  Trying to maintain diplomacy, Genghis sent an envoy of three men to the shah, to give him a chance to disclaim all knowledge of the governors actions and hand him over to the Mongols for punishment. The shah executed the envoy again, some sources claim one man was executed, some claim all three were, and then immediately had the Mongol merchant party Muslim and Mongol alike put to death. These events led Genghis to 