MOSCOW, October 8. /TASS/. Russia has donated to Syria three battalion sets of S-300PM missile systems of eight launchers each, a military diplomatic source told TASS on Monday.

"On October 1, three battalion sets of S-300PM systems of eight launchers each were delivered to Syria," the source said.

"These systems were previously deployed at one of the Russian aerospace forces’ regiments which now uses the S-400 Triumf systems. The S-300 systems underwent capital repairs at Russian defense enterprises, are in good condition and are capable of performing combat tasks," the source said, adding that the S-300PM systems were handed over to the Syrian side free of charge.

According to the source, along with the launchers Russia delivered more than 100 surface-to-air guided missiles for each battalion.