Gen. Hossein Salami was the chief of one of the country’s most powerful centers, and his death was a tough blow to Iran’s embattled leadership, which has had a series of setbacks in the past 20 months of Middle Eastern war and unrest. Salami rose to power six years ago and had a history of threatening the U.S. and Israel.

Saudi Arabia’s foreign minister held calls with counterparts across the Middle East to avoid a wider flare-up.