It is unfair to accuse Umno president Ahmad Zahid Hamidi of not doing enough to secure the release of his jailed predecessor Najib Abdul Razak, said the latter’s son Mohd Nazifuddin.

“Umno has given a lot of help, it would not be right to blame a single person… The president has helped. Many others have helped.

“But the efforts (to free Najib) have not...