Can one answer 'Amen' to Birkas Kohanim when in the middle of Psukei Zemira of Shacharis, and the Tzibbur has already reached repetition of Shemonei Esrei?
There is a permitted-interruption guide in the back of siddur which does permit answering "Amen" to most blessings but the question is whether Birkas Kohanim is in the category of 'most blessings'.
I am referring to the daily weekday or Shabbos Shacharis, when Birkas Kohanim is said by the leader and not the Kohanim.