NEW : CNN 's Christine Theodorou contributed to this report . Ali Karroubi also likens Ahmadinejad supporters to Taliban . NEW : Karroubi criticized media for blaming violence and chaos on demonstrators . Ali Rezaie withdrew his demand due to ` ` critical , '' ` ` pivotal '' campaign . Iran extends deadline for referendum regarding June 12 election .
NEW : Ali Karroubi also likens Ahmadinejad supporters to Taliban . NEW : Karroubi criticized media for blaming violence and chaos on demonstrators . Ali Rezaie withdrew his demand due to ` ` critical , '' ` ` pivotal '' campaign . Iran extends deadline for referendum regarding June 12 election .