Why was Abd el-Krim imprisoned by Spanish authorities in 1915?

In 1915, Spanish authorities imprisoned Abd el-Krim in Melilla due to a report prepared by military officials following an interrogation regarding his father’s activities and his own political views.1

The authorities accused him of holding pro-Central Powers sentiments, harboring animosity toward the French, and supporting the creation of an autonomous central Rif region that would be free from direct Spanish administration. These accusations stemmed from concerns that his family was violating Spain's neutrality during World War I by supporting German and Arab agents in the Rif. Consequently, he remained incarcerated from September 1915 until August 1916.1