Moroccan authorities this month arrested a dozen people they said were planning attacks on behalf of the Islamic State in the Sahel, a region south of the Sahara Desert, officials said on Monday. The discovery of the terrorist cell and what authorities called an imminent dangerous terrorist plot reflect the expanding ambitions of extremist groups in the region. Authorities did not provide details of the suspects' motives or their plot, beyond saying they planned to set off bombs remotely. They released photographs and videos showing officers raiding terrorist cells throughout the country. The images showed weapons stockpiles found during police raids, Islamic State flags drawn on walls, and thousands of dollars of cash. Morocco remains a major target in the agenda of all terrorist organisations operating in the Sahel, Habboub Cherkaoui, the head of Morocco's Central Bureau of Judicial Investigations, said at a news conference. Militant groups have been expanding their presence in