TEHRAN, IRAN - Iran summoned Swedish Ambassador Magnus Werndstedt after an employee of its embassy in Stockholm was injured in what Tehran called a "terrorist" attack, the official IRNA news agency reported on Saturday.

"Following the terrorist attack by anti-revolutionary groups on Iran?s embassy in Stockholm on Friday, the Swedish ambassador was summoned immediately," the IRNA report said.

An embassy employee was hurt when protesters entered the compound and attacked him, Stockholm police said.

Between 150 and 200 people had been holding a demonstration outside the embassy in protest at post-election violence in Iran.

"The protest was largely peaceful except ... when an unconfirmed number of people got through the fence and attacked one of the embassy staff," said police officer Ulf Hoglund.

The employee, whose nationality was not known, was punched and kicked and received medical attention at the embassy.