A reformist Web site says Iranian opposition leader Mir Hossein Mousavi has vowed not to let the blood of protesters killed in a post-election crackdown go in vain.
Mousavi made the remark on Tuesday night when he and his wife visited the family of Sohrab Aarabi, 19, who disappeared during a June 15 protest. The family has been told he had been shot dead. He was buried on Monday.
The Web site report says candles were lit in the streets of the neighborhood where the Aarabi family lives as Mousavi and his wife visited and hundreds chanted "death to the dictator," a reference to President Mahmoud Ahmadinejad.
Mousavi claims that Ahmadinejad won the June 12 presidential election through mass fraud. His supporters have repeatedly clashed with security forces since.