A Bulgarian court on Tuesday sentenced radical imam Ahmed Mussa and 13 other Bulgarians for propagating religious hatred and incitement to war in their support for the Islamic State militant group.

The trial against Mussa and his supporters began in 2016 following an investigation into suspected sympathizers of Islamic State in southern Bulgaria.

Mussa, already serving four years in jail for spreading radical Islam, was sentenced by the regional court in the southern city of Pazardzhik to 8-and-1/2 years.

His supporters, men from the southern towns of Plovdiv, Pazardzhik and Asenovgrad, received jail sentences of between one and 3-and-1/2 years. The only woman in the group got a suspended sentence.

Read more: Reuters