ISIS publicly beheaded an Iraqi teenager on Tuesday for listening to western pop music, the ARA news agency reports.

The 15-year-old boy was detained by Islamic State militants in the Iraqi city of Mosul after being accused of listening to the music at his father’s grocery store, the media outlet added.

The unnamed boy was taken to Sharia Court, which “issued a decision to execute him,” a spokesman for the local Nineveh media center told ARA News.

The execution is believed to be the first case of its kind documented in Mosul and has sparked outrage among the city’s residents.

While Western music is not specifically banned under Islam's strict Sharia law, analysts say the Islamic State is vehemently opposed to many western cultural influences.