Khairuddin Abu Hassan and Matthias Chang are expected to file a suit against Prime Minister Najib Abdul Razak for their detention under the Security Offences (Special Measures) Act 2012.

Lawyer Haniff Khatri Abdulla, who is representing Khairuddin, said the lawyers have been directed to serve letters of demand on Najib, inspector-general of police Khalid Abu Bakar, Deputy Prime Minister Ahmad Zahid Hamidi and attorney-general Mohamed Apandi Ali...