A home-made bomb found aboard an Iranian airliner was defused after an emergency landing, reports the BBC. Plainclothes security guards discovered the bomb in a bathroom of the plane shortly after take-off from Ahvaz, an oil-rich area along the Iraq border marked by unrest among minorities. The incident signals rising tension as presidential elections approach and President Mahmoud Ahmadinejad's victory is not assured.
(More Iran stories.)