Egyptian web editor arrested

The web editor of balady.net, an Egyptian Islamist website, has been arrested:
Egyptian authorities have arrested the second online journalist in six weeks, closing his website and confiscating work material.

Ahmed Mahmoud Abdallah, also known as 'Abu-Islam', is editor of the Balady Net news site and former editor of the now defunct opposition newspaper Al-Shaab. He is a member of the Union of Egyptian Journalists and head of the Centre for Islamic Enlightenment, a project that aims to encourage different religions to work together.

Mr Abdallah was arrested in Cairo on 5 December by state security agents.
I would assume that this had to do with the recent arrests of Brotherhood supporters, but I don't know much about this case right now.