About 100 demonstrators chanted slogans against the Iranian government outside the Swedish National Defence College, where Foreign Minister Manouchehr Mottaki was to give a speech. Some protesters threw eggs at the building.
The visit angered some exiled Iranians who accused Tehran of human rights violations and said Sweden should break off diplomatic relations.
Press freedom groups in the Scandinavian country urged the Swedish government to use the visit to voice strong protests against restrictions on free speech in Iran.
Wannabe Presidential failure Bernie Sanders is the embodiment of a foul-mouthed guttersnipe, an inconsequential political gargoyle sniping from the rooftops.