Stockholm ? The Somali man who attacked an artist who depicted the Prophet Muhammad in a controversial cartoon has previously been arrested in Kenya, Danish media reported Sunday.

The Danish intelligence agency PET knew that the 28-year-old Somali man was held in Kenya in September for allegedly participating in plotting an attack against U.S. Secretary of State Hillary Clinton, the Politiken newspaper reported Sunday.

Citing unnamed sources, it said he was later released due to lack of evidence.