Just days before the fifteenth anniversary of the Sept. 11, 2001 attacks, federal authorities have arrested a Kentucky woman who allegedly advocated online for terrorist attacks in the U.S. and promoted ISIS propaganda through her social media accounts, according to sources familiar with the matter.

The woman, identified as 55-year-old Marie A. Castelli, allegedly lied to authorities when confronted about her activities, sources told ABC News. According to jail records, her 56th birthday is on Sunday, the same day as the anniversary of the worst terrorist attack on U.S. soil. The FBI arrested Castelli Thursday. READ MORE