State-backed hackers from China have targeted staffers working on the U.S. presidential campaign of Democrat Joe Biden, a senior Google security official said on Thursday. The same official said Iranian hackers had recently targeted email accounts belonging to Republican President Donald Trump’s campaign staff.

The announcement, made on Twitter by the head of Google’s Threat Analysis Group, Shane Huntley, is the latest indication of the digital spying routinely aimed at top politicians.

Huntley said there was “no sign of compromise” of either campaign.

Iranian attempts to break into Trump campaign officials’ emails have been documented before. Last year, Microsoft Corp announced that a group often nicknamed Charming Kitten had tried to break into email accounts belonging to an unnamed U.S. presidential campaign, which sources identified as Trump’s.

Earlier this year, the threat intelligence company Area 1 Security said Russian hackers had targeted companies tied to a Ukrainian gas firm where Biden’s son once served on the board.

https://uk.reuters.com/article/uk-usa-election-alphabet-cyberattack/chinese-and-iranian-hackers-targeted-biden-and-trump-campaigns-google-says-idUKKBN23B2TN