Hillary Clinton on Saturday said the Chinese are "trying to hack into everything that doesn't move," just days after the State Department released thousands of pages of emails she had kept hidden on a private server.

"They're also trying to hack into everything that doesn't move in America, stealing commercial secrets ... stealing huge amounts of government information," Clinton said to supporters during a campaign event in New Hampshire.

Her comments came amid scrutiny of the former secretary of state's use of private email to deliver sensitive information.

In a number of cases, the information Clinton sent and received over her private email network was classified, contrary to her prior claims that no classified information was ever handled on the server.

Clinton also relied on at least two email addresses that were hosted on public domains while at the State Department, raising questions about her commitment to cybersecurity.

The presidential candidate has drawn attention back to her use of a private server each time she has spoken about digital defense on the campaign trail.

Republican leaders have stepped up calls to inspect the private server in the wake of revelations that Clinton had edited portions of emails she found unflattering before handing them over to the State Department, again contradicting prior claims.

Clinton said in March that she had turned over all "work-related" emails to the agency.