The angry hooligans, numbering 50-60, shouted slogans against a number of statesmen, Aftab news agency reported.
The trouble started shortly after mid-night in the uptown Tehran district of Niavaran. The first wave of attackers was repelled by the Center's guards and police officers who arrived at the scene.
The hooligans returned after the departure of the police, this time attempting to terrorize the neighborhood by lighting bonfires.
They were, however, unsuccessful in breaking into the building as they were held back by the guards and a spontaneous gathering of people who came to their aid.
The disturbance continued until about 5:30 am local time.
Apart from superficial damage, the Center remained unharmed and no injuries were reported.
The Center for Strategic Research is headed by Hassan Rowhani, a former chief nuclear negotiator, who has been accused by President Ahmadinejad of 'selling out' to the West, when Iran agreed to a voluntary and temporary suspension of uranium enrichment in November 2004.
The Center is affiliated to the Expediency Council whose Secretary -- Mohsen Rezaei -- is one of the four presidential candidates for the elections scheduled for June 12.
... Payvand News - 03/25/16 ... --