Source changed, info on injured added (first version was posted at 00:53)
Bombings in Iranian western city of Sanandaj left no casualty, but only made one slightly injured, ISNA reported.
Two successive sound bombs exploded in Azadi Square of Sanandaj, Kurdistan province in west of Iran, on Saturday night at 9:40 pm local time.
An official in Kurdistan province said, "the explosions have left no serious casualties, but only made one of the shopkeepers slightly injured."
Also four police officers and one civilian were killed in a terrorist attack in Sanandaj in October 2010.
The attack also left five police officers and four civilians injured.
In December 2010, 33 people including women and children mourning for martyr of Imam Hossein, Prophet Mohammad's grandchild in Tasua holiday, were killed in a terrorist attack in the southeastern city of Chabahar.
Also in September 2010, a bombing targeted a military parade in the northwestern city of Mahabad in West Azerbaijan province, claimed lives of 12 people and injured about 80 others.