Vyacheslav Dzirkaln, deputy director of Russia's federal service for military cooperation, said Monday that Moscow would hold back on a $550 million contract for the Yak-130 combat training aircraft until the violence in Syria subsides.
He said during an international airshow in Britain, however, the Kremlin hasn't embargoed existing arms contracts with Syria, Russia's state-run news service RIA Novosti reports.
Dzirkaln added that Russian warships would be sent to the region to defend shipping in case a blockade is imposed on Syria.
"The fleet will be sent on task to guarantee the safety of our ships, to prevent anyone interfering with them in the event of a blockade," he said. "I remind you, there are no limits."
Moscow this week drafted a resolution that would extend the mandate for a U.N. observer mission in Syria.
Former U.N. Secretary-General Kofi Annan met Monday in Damascus with Syrian President Bashar Assad in an effort to breathe new life into a peace plan that was to go into force in April.
The conflict in Syria entered its 16th month in July. As many as 10,000 people have died as a result of the fighting, which the government blames on opposition groups supported by foreigners.