Campaign says cybersecurity measures prevented hacking but disclosure raises renewed fears of foreign interference

Kamala Harris’s presidential campaign has confirmed it was warned by the FBI it had been targeted by a foreign influence campaign, triggering renewed fears over foreign interference in US elections.

The disclosure – reported by NBC – came after Donald Trump’s campaign claimed it had been hacked in an email phishing attempt, suspected to have been carried out by Iran.

The FBI has confirmed in a statement it is investigating foreign hacking attempts against the campaigns.