A cartoonist whose work inspired an internet campaign inviting people to draw images of the Prophet Muhammad has apologised for her role in the row.

Writing on her blog, Molly Norris said her satirical cartoon was "hijacked" and that the campaign was "offensive to Muslims".

Other people set up a page on the social networking site Facebook backing an Everybody Draw Muhammad Day.

It sparked outrage in Pakistan, where a court ordered Facebook to be blocked.