An Israeli satellite on Saturday revealed that Russia had deployed stealth fighters to Syria.
The Sukhoi Su-57 planes, the first of their kind, were spotted at the Khmeimim air base in the Syrian port city of Latakia.
In a statement, the Israeli satellite operator, ImageSat International, said that the Israeli Eros B satellite discovered two fifth-generation stealth planes, Sukhoi Su-57s. The planes are expected to carry out their initial "test" flights in Syria, and are not yet fully operational.
According to the RBK news agency, the jets were sent to Khmeimim for "a test in real conditions."