"Russian air force jets destroyed four targets of illegal oil extraction, located to the northwest of Raqqa and controlled by Daesh militants," Russia's Defense Ministry said in a statement.
Russian Su-34s have carried out a series of airstrikes against terrorist oil operations in Syria throughout the week. On Wednesday, jets took out a facilities in al-Hasakah Province. Strikes were carried out on installations near Raqqa on Tuesday, as well.
Raqqa is the self-proclaimed capital of Daesh, and believed to be a major waypoint for illegal oil making its way into Turkey.
On March 14, Russian President Vladimir Putin announced that the Russian Aerospace Forces unit had fulfilled its mission in Syria and that its withdrawal would begin the following day. Moscow does, however, maintain a military presence in Syria, as a deadline for a complete pullout has not yet been announced.