ATHENS (Reuters) - Greek police said they arrested a 32-year old Syrian man suspected of involvement in terrorist acts abroad. The man was arrested on Thursday in the northern city of Alexandroupolis and is expected to appear before a state prosecutor on Friday, police said in a statement.  The man had requested asylum in northern Greece. A police official said he was arrested for violating a restriction order imposed after his wife accused him of participating in  terrorist acts .   We are investigating his participation, and its extent, in past terrorist acts outside Greece,  police said. Authorities were also examining photographs found on his mobile phone, the police source said. 