At least three bombs exploded in the southwestern Iranian oil town of Ahvaz today, killing three people.
The semi-official Fars news agency said five people had been killed and 25 wounded in the blasts at about 9 a.m. (4.30 am Irish time).
State television put the number of wounded at 30, but did not say how many had been killed.
There was no immediate claim of responsibility for the coordinated attacks, which occurred just five days before Iran holds presidential elections.
A local journalist said four bombs had gone off near government buildings, including the governor's office, in the town, 340 miles southwest of Tehran.
He listed the other targets as the housing and urban planning department, the management and planning department and a housing complex for state media employees.
Later a bomb exploded in central Tehran killing one person.
Five people were killed in ethnic unrest in April in the partly Arabic-speaking province of Khuzestan, of which Ahvaz is the capital. Three hundred people were arrested.