Spain’s foreign minister on Saturday called for the immediate release of an activist detained by Israel after an aid flotilla bound for Gaza was intercepted by the Israeli navy in international waters. Saif Abukeshek, a dual Spanish-Swedish citizen of Palestinian origin, was detained for questioning in Israel on Saturday along with Thiago Ávila of Brazil. A legal aid group said both men had launched a hunger strike. Dozens of other activists were picked up by the Greek coast guard following the Israeli action and taken to the island of Crete. “This is a case of illegal detention in international waters, outside the jurisdiction of Israeli authorities. I have made this clear to my Israeli counterpart,” José Manuel Albares said in an interview with public radio. An Israel-based legal advocacy group, the Legal Center for Arab Minority Rights in Israel, or Adalah, said it had visited the two men at a detention site in the Israeli port city of Ashkelon.…