Given such violence, one has to wonder if Mr. Hallberg, who is currently in New York, might be better off sticking around instead of returning to Moscow as scheduled in June.

WSJ: Protecting Ballet's Global Reach

Members of the convoy, meanwhile, are returning home to Moscow from Damascus, Syria.

CNN: U.S. says Russian convoy off-route

The Russian ambassador's driver, who was more seriously injured, remains in a hospital in the Iraqi town of Feluja, accompanied by one other member of the embassy, and options for returning them to Moscow are under discussion.

CNN: U.S. says Russian convoy off-route