The mosque associated with an imam thought to have radicalized the Barcelona terrorists belongs to a federation with close ties to the Syrian Muslim Brotherhood. US media has identified Ali Yassine as the President of the mosque in Ripoll, Spain where Imam Abdelbaki Es Satty formerly belonged. According to a Washington Post report:
A police official in Spain says an imam whose home was searched as part of the investigation into two deadly vehicle attacks is believed to be the radicalizing force behind the cell of young men — and is now thought to have died in an explosion linked to the attacks. The official spoke on condition of anonymity to reveal details of the new suspicions surrounding imam Abdelbaki Es Satty. Officials in Es Satty’s former mosque in the northern town of Ripoll, which he left abruptly in June, on Saturday denounced the attacks in Barcelona and a nearby seaside town. The mosque president, Ali Yassine, said Es Satty told him he wanted to return to Morocco for three months and hasn’t seen him since. The police official says Es Satty is believed to have died in an explosion Wednesday that destroyed a house south of Barcelona.
The Post report goes on to identify the Annour Islamic Community Of Ripoll as associated with the mosque.
According to the Spanish Ministry of Justice registration record, the President of the Comunidad Islamica Annour De Ripoll is Ali Yassine. The registration also identifies the Unión De Comunidades Islámicas De España (U.C.I.D.E.) as the Federation for the Comunidad Islamica Annour De Ripoll. According to a 2007 RAND report:
In Spain, leaders of the Unión de Comunidades Islámicas de España [Union of Islamic Communities of Spain] (UCIDE)—one of the two federations that compose the government-recognized Islamic Commission of Spain—have close ties with the Syrian Muslim Brotherhood.