Cairo - Egyptian police have arrested an Al Jazeera news producer over accusations of attempting to overthrow the country's government and being a member of the banned Muslim Brotherhood, three security sources say. The Qatar-based broadcaster, which Egypt accuses of being a mouthpiece of the Brotherhood, said it did not know where Mahmoud Hussain was being held. Hussain was questioned for more than 15 hours at Cairo airport on Tuesday after arriving for his annual vacation, the broadcaster said on its website. He is currently based in Doha but worked in Egypt before Al Jazeera closed its office there in 2013. He was arrested at his Cairo home on Friday, Al Jazeera and the sources said. Officials from the Interior Ministry were not immediately available for comment.