Urgent - Muhammad Reza Saqaei (Istanbul)

Does anyone knows where Muhammad Reza Saqaei live? I know it's some wher in Taksim but do not know the address. Some one called me and said he found Mohammad's jacket with his passport and mobile phone. I sent Mohammad a message here and on facebook but did not reply to me. I hope he is not in any trouble. If anybody knows, please get in touch with me.