A woman who shouted threats against the prime minister during question time has been escorted from parliament’s lower house.

Jan Olson was removed from the public gallery by security guards after shouting “and we’re coming after you!” in the chamber.

Ms Olson was later met by a group of Australian Federal Police officers outside.

She told AAP her threat was centred on Tony Abbott and related to documents she was denied under Freedom of Information about his birth certificate and legitimacy as prime minister.

The disturbance did not disrupt proceedings but comes amid heightened security at parliament house in response to the terror threat level.

US president Barack Obama faced the same birth conspiracies with rumours circulating during his presidency campaign that he was not a US citizen.

Theories allege that Obama’s published birth certificate is a forgery and that his actual birthplace is not Hawaii but Kenya according to Wikipedia. Other theories allege that Obama became a citizen of Indonesia in childhood, thereby losing his US citizenship. Others allege that Obama is not a natural-born U.S. citizen because he was born a dual citizen (British and American).

However many have called these theories racist and Obama has never succumbed to pressure to show his birth certificate.