ZIGGY Switkowski won't say whether new public revelations in the Essendon supplements scandal are hindering his investigation.

The former Telstra boss has been hired by the Bombers to conduct an independent investigation into the club's governance, processes and procedures.

Switkowski's report is likely to be finalised in the next few weeks, although when contacted by AFL.com.au on Saturday he was unprepared to commit to a timeframe.

"That's really a question for the board, because I'm working on a report for the board," Switkowski said.  

"We had an understanding how long it might take but not a deadline as such."

Emails reveal Hird's supplement guidelines

Essendon chairman David Evans has committed to making details of the report public and to act on its findings.

Switkowski confirmed he was following the story in the media.

"Everybody's interested obviously," he said.  

"I'm reading to my surprise in the press that people are speculating."

However, Switkowski wasn't prepared to add to that speculation.

"I'm not talking to the media at all because I haven't completed my work, and every day is bringing new revelations in the media, so really I have nothing to say," he said.

Sheedy and Voss back Hird

Switkowski wouldn't say whether the new allegations against coach James Hird and constant media speculation were hampering his progress.

"As you can see I'm very reluctant to make comment on the process as it continues to its conclusion which is sometime into the future," he said.

Matt Thompson is a reporter for AFL Media. Follow him on Twitter @MattThompsonAFL