Anti-graft officers arrested seven more people yesterday in connection with the record $650 million seizure of seven million pirated compact discs and production equipment. But by late last night, 14 out of a total of 19 arrested in the past three days had been released on bail. The Independent Commission Against Corruption's Acting Assistant Director of Operations, Neil Maloney, confirmed that the only Customs and Excise Department officer arrested was among those granted bail. The head of the Customs prosecution, intelligence and investigation bureau, Acting Senior Superintendent Gregory Wong Pui-sham, 49, was the only officer taken in. There are fears more Customs officers from other sections could be enmeshed in the scam. The ICAC raids, which netted 41 production lines, were sparked by claims a syndicate offered bribes to a Customs officer in return for his protection. Customs officers said the Intellectual Property Investigation Bureau was responsible for piracy investigations, and no information on raids should leak out. Bureau head Superintendent Johnny Chau Wing-keung said: 'If other bureaus find any tips on piracy activities, they would pass them to us . . . Information on our probes would be disclosed to officers on a need-to-know basis only.' A source close to the ICAC admitted other officers could be involved. 'That's a logical deduction, but more time is needed for investigation,' he said. Acknowledging the department could face an image problem, Deputy Commissioner of Customs and Excise Raymond Li Wai-man said procedures would be reviewed. Mr Li said an extra 49 anti-piracy officers would be recruited to augment the 188-strong Intellectual Property Investigation Bureau. But he added: 'The cost of pirated discs is low. So I believe it will be difficult to weed out the activities. We hope to try our best to force the sales at shopping malls to go underground.' Hong Kong Business Software Alliance chairman Kevin Henshaw said the raids may help remove the SAR from the United States Watch List of intellectual property rights infringers.