Prime Minister Najib Abdul Razak says he is still having internal discussions about what issues to raise when he meets US president Donald Trump next month.

However, he said one of the main topics will be the fight against the terrorist Islamic State (IS) group.

"I will have a press conference before I go. I'm in the process of having internal discussions.

"But one of the main topics will be our fight against extremism and also the role Malaysia is playing, in making Southeast Asia a zone of peace...