Russia's Air Force has made over 20 flights in Syria in the past 24 hours and targeted nine Islamic State objects, Russian news agencies cited a Defence Ministry official as saying on Saturday.
The Defence Ministry official, Igor Konashenkov, said Su-34 and Su-24M aircraft took part in the strikes.
Russia earlier this week announced its decision to launch strikes on Syria, in a dramatic escalation of foreign involvement in a more than four-year-old civil war.
Konashenkov said a Su-34 airplane had destroyed a terrorist command post and underground bunker with explosives and weapons around Raqqa, RIA reported.
He also said a Russian Air Force bomber had struck an Islamic State camp and destroyed with a KAB-500 bomb seven pieces of heavy military equipment, a weapons store as well as a terrorist fortification.
"These and other highly exact means of attack in recent days have been used to target objects of Islamic State terrorists: command posts, stores of weapons and oil products, workshops where weapons of suicide bombers are made," he said.
(Reporting by Alexander Winning; Editing by Toby Chopra)