Speaking in an interview with China National Radio on Sunday, Liang Weidong, a deputy director in Pengshan's publicitydepartment, said that the authorities were first made aware of the ducks on Tuesday.
Officials at the defence ministry's publicitydepartment writing in the People's Daily Overseas Edition dismiss claims by US companies and media about a Chinese hacker threat as "laughable" and "unprofessional absurd speculation".
Committee chairman Edward Leigh said the department should consider how effective its publicity was on the issue of behaviour of groups such as stag and hen parties.
He was giving evidence on 6 December 2010 as part of a session on a revision to the Department for Communities and Local Government's code of practice on local authority publicity.
The Department of Justice does have an exception for matters that have already received substantial publicity, or where the community needs to be reassured that law enforcement is investigating the incident.