Russian President Vladimir Putin on Saturday issued an apology for the Azerbaijan Airlines passenger jet crash in Kazakhstan that occurred earlier this week, but stopped short of claiming responsibility for it.

Azeri President Ilham Aliyev says Vladimir Putin’s apology isn’t enough, in a confrontation that shows Moscow’s waning influence over former Soviet territories.

President Vladimir V. Putin of Russia told the Azerbaijani leader, Ilham Aliyev, in a phone call, “that the tragic incident took place in Russian airspace.”