"Russia’s Sukhoi-34 bombers from the Hamadan airdrome in Iran dealt a massive air strike against facilities of the terrorist organization of Islamic State (Daesh) in Deir ez-Zor province. The planes carried the maximum payload of high explosive fragmentation bombs OFAB-500,” Russia’s Defense Ministry said on Wednesday.

“As a result of the strike two command centers and large field training camps of the Islamic State near Deir ez-Zor were destroyed. More than 150 militants, including foreign mercenaries were killed,” the Defense Ministry said, Tass reported.

“After accomplishing their mission all Russian planes returned to base,” the ministry said.