Australian Opposition leader Tony Abbott has called for a police investigation into last week's Tent Embassy protest, while the woman said to have tipped off Aboriginal protesters said she had gone into hiding.
Abbott said the incident on Australia Day was the most serious security breach involving Australian leaders since the 1970s.
"It should be unthinkable for a security breach of this nature not to be fully investigated by the Australian Federal Police," he told reporters in Sydney yesterday.
"The only way to get to the bottom of this is to have a full investigation ... [with] sworn statements. The Prime Minister clearly does have to tell us what she was told verbatim by her office and by her former staffer, we need to know who knew what when and exactly who said what when."
Gillard and Abbott became trapped in a Canberra restaurant on Thursday when protesters from the nearby Tent Embassy surrounded them, angered by Abbott's earlier comments that it was time for the embassy to "move on".