( CNN ) -- The United States has information about more than 200 schoolgirls abducted in Nigeria by the militant group Boko Haram , but no `` solid evidence '' on their exact whereabouts , Defense Secretary Chuck Hagel said in an interview with Charlie Rose . Separately , another defense official told CNN there have been no new leads in several days , and there is `` somewhat credible '' information that has materialized over the past couple of weeks that the girls seized in April may have been broken up and moved across the Nigerian border , perhaps to Chad . The official also said there have been no verified photos or satellite images that might reveal a location . The United States deployed 80 forces to Chad to help in the search , the White House said this week . They will support intelligence , surveillance and reconnaissance aircraft missions .
Defense Secretary Chuck Kirk said the FBI has some information . Another official said there have n't been any new leads in several days . More than 100 schoolgirls abducted in the last month by Boko rebels .