MOSCOW - Russia's air force has delivered more than 40 tons of humanitarian aid to areas of Syria which are blocked by 'terrorists', Russian agencies quoted a defense ministry official as saying on Tuesday. Food and other cargo was parachuted to the besieged city of Deir ez-Zor and other localities blocked by Islamic State, Defense Ministry spokesman Igor Konashenkov was quoted as saying. Konashenkov added that a Russian bomber had destroyed strongholds in the Syrian province of Deir ez-Zor, where Islamic State had executed Syrian civilians en masse recently. He said the bomber's strikes had killed more than 60 terrorists in comments carried by agencies.