Syrian rebels have acquired shoulder-fired anti-aircraft missiles, NBC News reported late Tuesday night.

According to the report, Free Syrian Army rebels claim they now have nearly two dozen surface-to-air missiles smuggled from Turkey.

The exact type of missile was not mentioned in the report. Such a weapon, however, would offer a significant defense against helicopter gunships that Syrian government forces have deployed to target rebel strongholds such as Aleppo, where intense fighting has raged for nearly two weeks.