US Secretary of State John Kerry concurred, saying the violation might result in a 'shootdown'.
"We are greatly concerned about it because it is precisely the kind of thing that, had Turkey responded… it could have resulted in a shootdown, and it is precisely the kind of thing we warned against," Reuters quoted the Secretary of State saying during a visit to Chile.
The politician added that he had since intensified diplomatic discussions to ensure that there would be no accidental conflict between Russian and coalition aircraft over Syria.
Earlier, on October 3, a Russian warplane accidentally violated Turkish airspace in the province of Hatay, which is located a mere 50 km north of Russia's airbase.
Igor Konashenkov, a Russian defense official, told press on Monday that Saturday's incident involved a Sukhoi-30 fighter which crossed the Syrian-Turkish border "for a few seconds" due to "unfavorable weather conditions".
He urged against searching for any “conspiracy causes” in the incident.
NATO also commented on the issue, warning of “the extreme danger of such irresponsible behavior”.