From [1] AFP, with thanks to Anthony:

A plot to murder Ayaan Hirsi Ali, the Dutch lawmaker of Somali origin who is a leading critic of radical Islam, has been uncovered in the course of the investigation into the assassination of film-maker Theo van Gogh, the daily De Telegraaf said on Wednesday.

Hirsi Ali co-wrote the script for van Gogh's movie "Submission," dealing with the oppression and abuse of women under Islam, that led to his murder on November 2 by a suspected Islamic radical. Under tight police protection, she was reported to be planning a sequel to the movie and writing a book targeted at Muslims.

De Telegraaf said a document was found during a police raid on an apartment in Amersfoort that was searched as part of an anti-terrorism swoop.

It added that the plan was to assassinate Hirsi Ali on New Year's Eve when the sound of shots would have been masked by the noise of fireworks.