7 Bombings Shatter Iran's Pre-Election Calm, Killing 10 - New York Times:
"Even so, if a pro-Hussein group is responsible for the bombings in Iran, that suggests that the instability plaguing Iraq may have begun to spill over into Iran. It also suggests that Iran's leaders could get more involved in Iraqi politics.
Mr. Mohammadi rejected the possibility that Iran's armed opposition group in exile, the Mujahedeen Khalq, was behind the bombings. But he said the bombings were aimed at undermining public participation in the election on Friday.
Bomb explosions have been almost unheard of in Iran since the eight-year war with Iraq ended in 1988. .
There were some indications that the Ahvaz bombings might have been rooted in a more local dispute. Ahvaz was the site of ethnic protests in April over rumors that the government wanted to relocate some of the region's Arab population.
The rumors grew out of a letter that had been circulated suggesting that there was such a government plan. The government said the letter was forged, but 250 people were arrested in the protests, and at least one person was killed."