According to reports from an online flight-tracking source, two new Russian Aerospace Forces strike fighters have arrived at the Hmeimim military airport in western Syria, Al-Masdar News reports.

The fighter aircraft, identified as Su-34s, appear to have arrived at Hmeimim during some point on Thuesday, March 29 afternoon; the aircraft were escorting a Tu-154 which also landed at the Russian base.

It is unclear if the three aircraft have come to Syria as part of a combat deployment or are only stopping briefly at in the country en-route to another location, the media outlet says.