Amanah president Mohamad Sabu has questioned the authenticity of a letter purportedly written by PAS president Abdul Hadi Awang in Arabic to Muslim leaders worldwide.

In a statement, Mohamad said he personally believes that the letter - which attacks Pakatan Harapan and defends Perikatan Nasional - was not written by Hadi, in his capacity as a special envoy to the Middle East.