"China's malign foreign influence campaign targets our policies, our positions, 24/7, 365 days a year," FBI boss Christopher Wray said on Tuesday.
The former linguist later admitted that he had known the suspect for years.
U.S. Secret Service arrested Yujing Zhang on Saturday after she got through perimeter checkpoints
The former FBI director spoke to NBC News in his first on TV interview since the special counsel ended his investigation.
Spanish court reveals details of mysterious break in.
He is the alleged leader of a group of 10 people who attacked the North Korean embassy in Madrid on February 22.
Donald Trump is considering revoking security clearances for ex-CIA Director John Brennan and other Obama-era critics of his administration.
An off-duty FBI agent was caught on camera accidentally shooting a bystander in the leg when his gun fell from its holster as he performed a backflip in a bar
Former FBI director's notes on conversations with President Donald Trump unusually also made available to the press.
Sales of the former FBI director's memoir were reported to be brisk
Democrats release redacted version of a 10-page rebuttal to Republicans' FISA memo.
Document was a rebuttal to Republican claims that the FBI had an "anti-Trump bias" during its Russia investigations
A year ago, Donald Trump's then-national security adviser met FBI investigators probing Russian ties without telling the new president or his staff, sources say.