Nigel Olsson's Facebook page says he has learned that there's an imposter account for the musician on Instagram.
The message to fans continues:
''Please do not follow it, and if you are already following it, we would appreciate it it if you unfollowed it. The account has been reported, and Nigel and his family are hoping it will be taken down.
''If we ever do decide to branch out onto Instagram, you will certainly read about it here first.''