One of the suspects praised the Boston bombing , Spain 's interior minister says . Minister : Police consider the suspects to be `` lone wolves , '' like those in Boston . " Comment: The FBI is investigating a possible connection between two men who were arrested on Friday and are suspected of being involved with an Islamic extremist group that has claimed responsibility for several recent attacks against U.S. They have been in touch with Islamist extremists in Mali , Interior Ministry says .
One of the suspects praised the Boston bombing , Spain 's interior minister says . Minister : Police consider the suspects to be `` lone wolves , '' like those in Boston . They are suspected members of a radical cell with ties to al Qaeda in the Islamic Maghreb . They have been in touch with Islamist extremists in Mali , Interior Ministry says .