The FBI says it isn't giving up the search for 11-year-old Celina Cass of New Hampshire, who hasn't been since Monday night. The agency offered a $25,000 reward today, on top of a $5,000 reward offered by a private citizen, for information leading to the girl, reports CNN. "We are still aggressively, aggressively searching and hoping to bring Celina Cass home," said an FBI official. Celina's family says they last saw her in her room Monday night using the computer. Friends have set up a Facebook page here. (More Celina Cass stories.)