On Tuesday, Defense Ministry spokesman Maj. Gen. Igor Konashenkov said that Russian planes had carried out a total of 182 strikes against Daesh over the last 24 hours.
The strikes were preceded by drone-based reconnaissance showing fortified Daesh positions on the eastern bank of the Euphrates River near the city of Mayadin, about 70 km west of Syria's border with Iraq.
Daesh targets in the area included an ammunition depot and a network of fortified underground tunnels sheltering a large group of militants.
Two pairs of Su-34 fighter-bombers took turns attacking the area, hitting the target 14 times. The strikes eliminated four tanks, three infantry fighting vehicles, nine off-road vehicles fitted with large-caliber machine guns, and two rocket artillery systems. The Russian military estimates about 50 Daesh casualties from the attack, with another 30 trapped in underground tunnels.
In a separate strike, the Aerospace Forces eliminated nearly three dozen militants near the village of Hatla, Deir ez-Zor province, along with five heavy machine-gun equipped jihad-mobiles and two ammo-carrying vehicles. The terrorist caravan had arrived in Syria from Iraq, according to the Defense Ministry.
The city of Mayadin serves as a staging area for Daesh attacks in Deir ez-Zor province against Palmyra and the city of Deir ez-Zor. The Syrian Army is conducting an operation to encircle the militants in the city, and to squeeze the rest out of the area.