Yes.
BEIRUT, Lebanon: The militant Hezbollah group has appointed a successor to its slain top commander Imad Mughniyeh, killed in a car bomb blast this week in Syria, a Lebanese security official said. The official did not identify Mughniyeh's successor but said the heir was selected shortly after the shadowy fugitive's death. The official spoke Friday on condition of anonymity because of the sensitivity of the issue.
"The Hezbollah command appointed a successor to Mughniyeh shortly after news of his assassination broke," the official in southern Lebanon told The Associated Press. The successor was expected to take charge of Hezbollah's well-trained and armed guerrilla, the official also said.
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http://www.iht.com/articles/ap/2008/02/16/africa/ME-GEN-Lebanon-Mughniyeh.php