母亲4/27面签。当时告诉她过了。到现在网上的签证信息是 administrative processing。。请问有同样经历的

给父母办B2签证。母亲的一直没收到。网上信息Status Updated Date:27-Apr-2015 一直没变。

母亲是面签。当时告诉她过了。然后网上的签证信息一直是:
Your visa case is currently undergoing necessary administrative processing. 
This processing can take several weeks. Please follow any instructions 
provided by the Consular Officer at the time of your interview. If further 
information is needed, you will be contacted.

请问有同样经历的么?大概要等多久?谢谢
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