The Guardian reported that Song had been taken to hospital following a stroke and that his situation is currently critical.
Song became a fan favourite at Galatasaray and was nicknamed the lion – the Istanbul giants are also known as the Lions.
We want to send our prayers and good wishes to Rigobert Song who is currently in intensive care. Our hearts are with you, lion! pic.twitter.com/QTAdYgP9gp
— Galatasaray EN (@Galatasaray) October 2, 2016
Liverpool also sent out a message to their former player via the official club twitter account.
Our thoughts are with Rigobert Song and his family at this time. pic.twitter.com/wIzoxrg8U3
— Liverpool FC (@LFC) October 3, 2016
The 48-year-old is currently the manager of Chad and had over 100 caps for Cameroon as a player.