A coalition of NGOs has issued an open letter addressed to Prime Minister Najib Abdul Razak, urging him to put a stop to the ‘red shirt rally’ slated for Wednesday.

The letter by the group Otai Reformis and endorsed by 19 other groups even compared the rally organisers to militants of the self-proclaimed ‘Islamic State’ (Isis), and said Najib should have stepped in from the day reports emerged on the racial issues being played up.