Crimeans voted on Sunday on whether to break away from Ukraine and join Russia in a referendum that has alarmed the ex-Soviet republic and triggered the worst crisis in East-West relations since the Cold War.
From Euro news
I wonder whether the words "ex Soviet republic" refer to Russia or Crimea or Ukraine or Kiev.
I also wonder what "alarm" mean.
My try is :
The referendum has scared the Crimea that had been a ex part of ex Soviet republic.
Other Possible interpratation:
The referendum has caused a potential fear in Russia (that is ex Soviet republic)