Reading Zhang Fei's Post 33 - I take this as an 'unofficial shutdown' of mosques.
I.e., no one will admit it - but they are either tearing down mosques under various pretenses, and/or refusing to allow new ones to be built.
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International Religious Freedom Report for 2011
United States Department of State
Bureau of Democracy, Human Rights and Labor
http://www.state.gov/documents/organization/192890.pdf
The Muslim community claimed they could not practice Islam freely because the government does not recognize Islam and selectively intervenes to close mosques, schools, or community centers.
On November 16 local authorities in Cacuaco, Luanda Province, arrived unannounced with heavily armed guards and forcibly tore down a large tent being used as a mosque. The authorities allegedly used excessive force and intimidation, gave no written order of a violation, and offered no compensation for the destroyed structure.
In December, a Muslim group in Malange Province applied for permission to build a large, permanent mosque on land they had purchased near their small, temporary mosque. After several months of waiting without receiving a reply, and despite repeatedly asking local authorities to grant or deny their application to build, the Muslim group began construction. Shortly after construction began, local authorities arrived and destroyed the foundation. The authorities did not provide either a denial of the building application or a citation for an offense.