KUALA LUMPUR, Jan. 30 -- The Malaysian Anti-Corruption Commission (MACC) has detained five more people, including four enforcement officers and one retiree, as it expands its investigation into a prominent massage parlour chain suspected of large-scale bribery and tax evasion.

The latest arrests are part of a major probe that has seen the MACC freeze 124 bank accounts belonging to individuals and companies, involving a total of approximately RM13.3 million.

According to sources, the massage parlour network is believed to have paid out RM2.7 million a year in "protection money" to officers from various enforcement agencies.

The syndicate also allegedly used a two-tier accounting system to hide 80 per cent of its cash sales, resulting in...