A small bomb detonated outside the municipality building of Robat Karim in Tehran province on Tuesday evening, causing a loud blast but no injuries or significant damage, according to the county governor.
Authorities are investigating the explosion that occurred outside the municipality headquarters, Reza Aghaalikhani told Revolutionary Guards-affiliated Tasnim News, adding that the incident caused no casualties or serious material losses.
He said the device was “probably a sound bomb,” a type of low-impact explosive used mainly to create noise rather than destruction.
The official added that the blast triggered a loud shockwave that prompted the immediate deployment of security and emergency teams to the scene.
Technical and forensic examinations were underway to determine the type of device used and whether any group or individual was behind the explosion, according to the local governor.
No arrests or claims of responsibility have been reported so far. However, similar incidents have happened before mainly as acts of protest against the Islamic Republic.
Last week, Iran's Supreme Court upheld the death sentence of Manouchehr Fallah, a 42-year-old laborer from northern Iran for allegedly detonating a small sound bomb outside a local courthouse in Gilan province.
The explosion caused minor damage estimated at 150 million Iranian rials or about $138 to a metal door and the building's stone facade. No injuries were reported, and public services were not disrupted.
Authorities have charged him with "moharebeh" or war against God, a charge that carries the death penalty.
