Spanish security forces say that Mohamed Almedi Khalou, a former Moroccan army officer, is now leading some 1,200 Moroccans who have joined Islamic State forces in Syria in a group called the Harakat al Sham, or Sham al Islam. Khalou reportedly replaced Brahim Benchekroun, a former Guantanamo detainee who was killed in Syria in April. Prior to his death, Benchekroun had begun planning attacks in Morocco. At least 35 Spaniards are estimated to have joined the ranks of rebel fighters in Syria, and most are thought to have joined the Islamic State.