Hillary Clinton responded on Friday to a scathing assessment by the Federal Bureau of Investigation that she was "extremely careless" with classified government secrets by shifting the blame onto her former colleagues at the U.S. State Department, Reuters reported. After maintaining for more than a year that she did not send or receive classified information through her unauthorized private email server, she acknowledged on Friday she may have at least unwittingly done so, three days after the FBI concluded this happened at least 110 times. Clinton, the presumptive Democratic presidential nominee, said she "certainly did not believe" that she was handling classified information on her server at the time, but emphasized that she followed the lead of her subordinates on whether information was classified. "These are experienced diplomats, they have expertise in handling classified material," Clinton said in an interview with PBS Newshour. "They were not careless and the material that they sent, they did not believe that was classified." Clinton, who was the department's most senior classifying authority during her four-year tenure at its helm, did not address the FBI's conclusion that she herself sent information on topics classified as 'top secret', the highest level, through the private server she kept in her basement.