Armed Syrian opposition groups have allegedly begun to operate a number of anti-aircraft missile systems captured from regime forces, according to an Italian news agency.

On Monday, AKI news agency cited an opposition as saying that rebels “have recently begun to use” five Russian-manufactured 9K33 OSA short-range surface-to-air missile systems after acquiring the technical know-how to activate them.

The source explained that rebels captured six of the mobile missile platforms, five of them in working condition, since June 2013, however were they unable to break the codes necessary to successfully bring the systems online after accidentally destroying the manuals and codes that came with the anti-aircraft weapons. […]