One person was arrested for arson .
11 were arrested for carrying firebombs on the night of July 21 -- 22 , bringing the total number of individuals arrested ( regardless of charge ) to 150 .
One person was arrested for arson and 11 were arrested for carrying firebombs on the night of July 21 -- 22 , bringing the total number of individuals arrested ( regardless of charge ) to 150 .