The reported disappearance of a Syrian-American lesbian blogger is taking a mysterious turn as a London woman claims photos plastered across the Internet and newspapers are of her, not of the blogger.

The blogger, Amina Abdallah Araf, was last seen Monday in Damascus being bundled into a car by three men in civilian clothes, according to her cousin, Rania Ismail, as reported by the Associated Press. Ms. Araf, which chronicles her life in "A Gay Girl in Damascus," included descriptions of her participation in antiregime...