The head of Australia's sports anti-drug authority has warned that any of his staff members could face criminal charges if they were involved in the Port Adelaide drug testing tip-off scandal.

The Australian Sports Anti-Doping Authority (ASADA) is investigating how Port players knew drug testers were coming this week when the tests are supposed to be random.

Port's Chad and Kane Cornes were both told by their father Graham that ASADA testers were on their way after the radio station Graham works for, Adelaide's 5AA, was tipped off by an off-air caller.

The tip-off scandal follows the leaking of drug testing information last year to the media about a list of AFL players who were on two strikes under the league's illicit drugs policy.

ASADA is looking into the latest tip-off to see if it can determine who called Russell Ebert, a radio colleague of Graham Cornes and an employee at the Power, and how the drug tests were compromised.

ASADA chief executive Richard Ings said the authority took the leaked information "very seriously" and hoped his investigator would complete his inquiries at Port and 5AA within the next few days.

Ings said all ASADA employees were bound by confidentiality contracts and that if any of his staff were responsible for the tip-off they would face "swift and severe" punishment.

"They are very conversant with their rights and obligations and the repercussions for breaching those obligations are severe, including, in certain cases, criminal sanctions," Ings told Melbourne radio station Triple M.

"There's not a single person within ASADA not aware of their duty with care in regards to confidential information."

Ings said the ASADA investigator was yet to speak with Ebert.

He said the authority would also "dearly love" to speak with the informant who tipped off Ebert, who has been dubbed "Mr X".

A Federal Police investigation into last year's leak failed to find the culprit responsible.

AAP