DEBKAfile - Iran on war alert over "US and Israeli concentrations" in Azerbaijan
DEBKAfile reports: "In a rare move, Iran has declared a state of war on its northwestern border [...] Iranian sources report that in the last few days, Israel has secretly transferred a large number of bomber jets to bases in Azerbaijan, via Georgia, and that American special forces are also concentrated in Azerbaijan in preparation for a strike.

Comment: DEBKAfile is a great source for speculative analysis, so file this under rumors of war. I've not been able to find any independent confirmation of this.