Despite intense calls of investigation coming from the Coalition, the Australian Federal Police (AFP) said on Monday that the information leak which preceded the Australia Day controversy did not merit a criminal investigation.

In a statement, the AFP said that its analysis so far of the incident failed to establish criminal liabilities on Tony Hodges and union leader Kim Sattler.

The Australian has earlier reported that Hodges was the source who revealed to aborigine protesters that Opposition Leader Tony Abbott was in The Lobby restaurant with Prime Minister Julia Gillard.

Upon getting the information that Abbott was in the restaurant, activists trooped to the site and surrounded the place, forcing the security details of Ms Gillard to bodily evacuate her and Abbott.

"The AFP can confirm it became aware of information concerning the alleged disclosure of information on the location of the Leader of the Federal Opposition, Mr Tony Abbott, during Australia Day," the AFP statement said.

"The AFP subsequently evaluated the information and no evidence of a criminal act was identified ... as such, the AFP is not conducting an investigation," the federal police was reported by the Australian Associated Press (AAP) as saying.

Earlier, Abbott characterised the incident as a serious breach of security that compromised the safety of Australian federal officials, which he added was enough reason for the AFP to step in and start an inquiry.

His position was echoed by Shadow Attorney-General George Brandis, who had indicated that he will put AFP Commissioner Tony Negus to task for the police agency to launch an investigation.

Judging from what everyone saw on television footages, Brandis insisted that Ms Gillard and Abbott were momentarily threatened by the protesters, who reportedly were irked by Abbott's earlier comments.

"Nobody can doubt that the prime minister's safety was compromised," Brandis told ABC Radio in an interview.

He added that is Ms Gillard would not file a formal referral for the investigation to proceed, the Coalition will do so on Monday.

On her part, Ms Gillard said that the facts surrounding the Australia Day incident only reached her the day after.

Around that time, Hodges, Ms Gillard's aide, had already resigned while Labor leaders tried to downplay his actions as a staff that overdid his duties in attempts to please the Prime Minister.

Also, Federal Treasurer Wayne Swan has suggested that the Coalition may be over-reacting and in the process transforming the whole situation into "a fully-fledged smear campaign."

Swan conceded that for a short while, the Prime Minister's safety and that of Abbott's was put into question as protesters outside of The Lobby appeared to be getting out of control.

He, however, assailed the Coalition for veering away from the real issue, which he added was strictly a matter for the federal police to resolve.

"For Mr Abbott now to try and turn all of that on its head and to throw mud ... is yet another example of just how negative Tony Abbott is," Swan told ABC.