Top opposition leaders from DAP and PAS will participate in a forum tomorrow on Islam in Malaysia.

Speakers for the forum, titled 'Is Malaysia an Islamic state?', are PAS vice-president Dr Hasan Mohd Ali, DAP chairperson Lim Kit Siang and Anuar Abdul Razak, a fellow of the Institute of Islamic Understanding Malaysia (Ikim).

The event organised by the Catholic Research Centre (CRC) will be moderated by Dr Patricia Martinez, an academic from Universiti Malaya who specialises in Islam.

"The forum is essentially for the Catholic congregation and we have only publicised the event via the circulation of flyers at churches," said a representative of the CRC.

About 600 members of the Christian community are expected to attend the forum which will be held at the St Francis Xavier's Church in Petaling Jaya, 8pm.