"I am ready to propose further sanctions in response to the regime's brutal repression of the protests," Kallas said in comments to the news site Politico Europe and the German newspaper Die Welt.
"Citizens are fighting to choose their own future and are risking everything to make themselves heard," the foreign minister said.
The EU already has sanctions on more than 230 people and 40 companies and organizations in Iran over the regime's previous harsh actions against protesters.
