Called USEmbassy-Papers Under Review

I called US Embassy around 1:30am EST today using their contact # (632) 301-2000 extension 5184 or 5185. The lady that I spoke to was very polite. I gave her the case # and my name for security verification. I was told that the additional documents was received and was forwarded to the CO on 9/29 for review. She added that the review usually could take 3-4 weeks and I was advised to call in 2 weeks. But, I might give them a call again next week around this time of the day for an update of my mom's visa.