The Centre for Maintaining Peace and Order has blacklisted 30 major business groups for having supported the People's Democratic Reform Committee, Department of Special Investigation chief Tarit Pengdith said Monday.
Tarit, a member of the CMPO, said the peacekeeping agency would send a letter to each of the 30 business groups to stop supporting the PDRC and its protesters.
He said the CMPO had assigned the Anti-Money Laundering Office and the DSI to conduct further investigations for taking actions against the 30 business groups.
He said they had provided financial support, accommodations, vehicles and tools to the PDRC and protesters.
Tarit said the names of the 30 firms would still be kept secret.