Johor ruler Sultan Ibrahim Sultan Iskandar had unleashed a vitriolic salvo on a politician, whom he believed could be a little senile due to his advanced age.

Observers claimed that the target was former prime minister Dr Mahathir Mohamad.

Some 24 hours later, a Facebook page for the supporters of Mahathir's son, Mukhriz, recounted the relationship between the Johor sultan's late father, Sultan Iskandar Sultan Ismail, and Mahathir.