Moroccan authorities intercepted dozens of migrants seeking to cross into the Spanish North African exclave of Ceuta on Saturday, reports say.More than 100 people were blocked trying to make their way to the border on the outskirts of the town of Fnideq, according to Moroccan security sources cited by Spanish media and the Reuters news agency.It comes a fortnight after roughly 78,000 migrants arrived in the exclave by sea in a matter of hours - 100 of whom died, according to the city's mayor, who also said the vast majority of arrivals had returned to Morocco.Security had been stepped up in the area after the influx and amid suggestions on social media of a second mass crossing attempt this weekend.The security sources said 111 people had been detained in or around Fnideq - known in Spanish as Castillejos - about 3km (1.8 miles) from the border, the majority of whom were from sub-Saharan Africa.Moroccan police - including some in riot gear - reportedly used tear gas to disperse groups of migrants gathered on nearby hills.Earlier this week, Rabat said it was monitoring "the circulation of social media posts and messages of unknown origin" calling for a mass crossing Saturday, warning it would prosecute organisers and participants.