SINGAPORE - As many as eight men, instead of the five previously suspected, are now said to have been involved in last week's brazen $600,000 robbery of a money changer in an open-air carpark.

This was revealed in court on Friday even as two Malaysians, Tachana Moorthy Peromal, 28 and Ravi Sandhira Sagaran, 27, became the second and third suspects to be charged over the Nov 5 incident at Block 110 Aljunied Crescent.

Together with other unknown persons and Singapore permanent resident Annudarai Raman, 42, who was charged last Saturday, they are said to have robbed money changer Ali Yousouf Saiboo, 35, around 12.53am that morning.

One or more of the men were allegedly armed with a crowbar and voluntarily caused hurt to their victim by kicking him in the stomach, according to court documents.

All three men will next appear in court on Nov 21, after District Judge Eddy Tham granted a police request that the men be remanded one more week to conduct further investigations. The time was needed to ascertain the identities of five other suspects in the case, the court heard.

Annudarai is represented by Mr Mathew Kurian, while the other two men are represented by Mr Sunil Sudheesan.

If convicted of committing robbery with hurt, the suspects face up to 20 years in jail and at least 12 strokes of the cane.