Mehdi Mahmoudian, co-writer of the Oscar-nominated film 'It Was Just An Accident', has been arrested in Iran for signing a letter criticizing Supreme Leader Ayatollah Ali Khamenei and the government's handling of protests. Along with Mahmoudian, two other signatories were also arrested. The letter condemned the government's actions during protests that have resulted in thousands of deaths. Jafar Panahi, the film's director, expressed concern for Mahmoudian, highlighting his character and contributions in prison. The film has received critical acclaim and is nominated for multiple awards.