Sources suggest Moroccan authorities are working with FBI , German arrests . Three additional suspects involved in April 28 bombing that killed 17 . CNN learned Wednesday from security sources that Moroccan police have apprehended three Moroccan males in the coastal town of Safi , the hometown of the alleged chief perpetrator of the bombing , Adil El Atmani . Sources suggest connection between Marrakech bombings and German arrests .
Sources suggest Moroccan authorities are working with FBI , German arrests . Three additional suspects involved in April 28 bombing that killed 17 . Sources suggest connection between Marrakech bombings and German arrests .