Later on Tuesday, Russia's state tourism agency, Rostourism, recommended suspending sales of tour packages to Turkey following the incident, according to Reuters, and Sergei Lavrov, the Russian foreign minister who was due to visit Istanbul on Wednesday, canceled his trip, according to Russian media.
The fate of the two Russian pilots, who ejected from the plane as it descended to the ground, remains uncertain and could have an impact on the strength of Russia's reaction. Reports suggest one was killed but another is alive. On Wednesday, the Russian defense minister said one of the pilots had been returned to a Russian base in Syria. The surviving pilot indicated that he had not received any visual or radio warnings from Turkey before the plane was downed, according to the RIA news agency.
On Tuesday, the Turkish Military released an audio recording of what it says was a warning to the Russian jet before it was shot down. According to a Reuter's report, voices on the recording can be heard saying, "change your heading," repeatedly.
The Turkish Military also said it held discussions with Russian Military attaches, according to Reuters. The Turkish military told the attaches that rules of engagement were implemented when the Russian jet did not respond to the military's warnings and that it worked hard to find and rescue the Russian pilots who were ejected from the plane.