Russian military in Syria for several weeks blocking the signals of satellite navigation GPS of American unmanned aircraft. This is reported by NBC News referring to four US officials.

According to the interlocutors of the television channel, this significantly affects the operations of the US Armed Forces in Syria. The Russian military fears that the United States will retaliate after alleged chemical attacks in East Gut, so they decided to jam the GPS of American drones, NBC sources say..

Interference is created for relatively medium-sized scout drones, they say. According to sources, the means for hindering the interference that Russians use are very complex and capable of overcoming even the protection from jammers.

It's not hard to stop the drone from the GPS satellite, explained NBC director of the radio navigation laboratory at the University of Texas, Dr. Todd Humphreys. For the first time, American experts noticed attempts by Russians to jam the GPS to American drones in the east of Ukraine four years ago, he says.

. According to him, such interference also seriously hampered the work of the UN observation drones, which they tried to use to monitor the situation in Donbass.

The Pentagon refused to answer the question whether the GPS signal blocking can cause the drone to crash. Representative of the US Department of Defense Eric Peyhon assured that the military take the necessary security measures and countermeasures to protect manned and unmanned military aircraft.