A TV documentary about her, shown last week, triggered calls for her to be stripped of her Dutch passport.

Ms Hirsi Ali, a fierce critic of Islamic fundamentalism, has had continuous police protection since the murder of film-maker Theo van Gogh.

She wrote the script for his TV film Submission, which angered many Muslims.

A radical Islamist, Mohammed Bouyeri, 27, is serving life for the November 2004 murder of Van Gogh.

Ms Hirsi Ali did not deny that she had lied in her 1992 asylum application, her spokeswoman Ingrid Pouw told the BBC News website.

False data

"Everybody knew she lied about her asylum," she said, explaining that Ms Hirsi Ali had changed her name and birth date in her application.

She had also concealed the fact that she had arrived from Kenya via Germany, Ms Pouw said.

"She told them she came from Somalia - that's why she got A status asylum in just five weeks," Ms Pouw said.

Radio Netherlands reports that Ms Hirsi Ali had revealed the truth about her background in interviews and again in 2003 when the liberal-conservative VVD party asked her to stand as a parliamentary candidate.

Ms Hirsi Ali will give a news conference at 1330 (1130 GMT) in The Hague on Tuesday, her spokeswoman said.

She did not confirm a report in the Dutch newspaper De Volkskrant on Monday that Ms Hirsi Ali plans move to the US to take up a job at the American Enterprise Institute think-tank.