Iranian opposition leader Mir Hossein Mousavi's father has died of a disease, Iranian Asriran.com website reported.
Mir Hossein Mousavi and his wife are under house arrest.
Several protesters were injured, while one was killed during the clashes between protesters and police in the Iranian capital and several cities of the country on February 14.
The Iranian government arrested the opposition leaders. Mousavi and Karroubi and their wives were taken under house arrest.
