CASABLANCA, Morocco — Hundreds of migrants trying to reach the Spanish exclave of Ceuta by land and sea were arrested by Moroccan security forces, Moroccan state television reported Sunday, as authorities tightened security along the border following calls for a new mass crossing. Moroccan state broadcaster Medi 1 TV said 294 migrants from sub-Saharan Africa were arrested Saturday while attempting to enter Ceuta. Authorities also arrested 61 Moroccans accused of facilitating the migration attempts, the broadcaster reported. The attempted crossings followed a surge in social media posts calling on migrants to make their way to Ceuta, a Spanish city on Morocco’s northern coast. In response, Moroccan and Spanish authorities beefed up security presence and limited movement toward the area. The latest attempt comes two weeks after tens of thousands of would-be migrants, driven by poverty and misinformation, rushed toward Ceuta in one of the deadliest migration crises to hit the region. At least 90 people died on both sides of the border, according to official numbers, while human rights