Party leaders have condemned a doctored photo posted by Geert Wilders on Twitter that appeared to show D66 leader Alexander Pechtold taking part in a pro-Islamist demonstration.
Wilders tweeted the picture with the caption: 'Pechtold demonstrates with Hamas terrorists. Is this the next step?'
The original image, which belongs to US-based picture agency Getty Images, was taken at a demonstration in London in 2009 against Wilders's visit to the UK. In Wilders' version Pechtold's face is crudely pasted in beneath a banner reading: 'Shariah for the Netherlands.'