A time-bomb planted in public toilets in Ahwaz City was defused on Saturday, according to Iran's Fars News Agency.
Local security chief Rahim Heidari said the bomb was discovered in Taleqani Square at 10.50am and security services were hunting the culprits. He said the aim of the attempted bomb attack was unclear.
At least 15 Ahwazi Arabs have been executed in relation to bomb attacks in Ahwaz City, although Iranian and international human rights organisations and UN human rights experts have criticised their trials as flawed. The Iranian government and its supporters in the West have repeatedly claimed that the US, British and Israeli governments are responsible for ethnic unrest among the persecuted Ahwazi Arabs.