Pharrell Williams has criticised authorities in Iran after music fans were arrested for recording a video tribute to his international hit song Happy.
A video clip of six young men and women dancing to the song on the streets of Tehran, Iran was uploaded to YouTube in April. Iranian police have since launched an investigation and have detained several people in connection with the uploaded video.
Tehran Police chief Hossein Sajedinia said, "After a vulgar clip which hurt public chastity was released in cyberspace, police decided to identify those involved in making that clip."
Williams took to his Facebook account to express his disappointment, writing, "It is beyond sad that these kids were arrested for trying to spread happiness."
Happy has inspired thousands of fans across the world to create their own versions of the music video.