WASHINGTON — The FBI said Monday it is investigating allegations that sensitive documents from the Trump campaign were stolen in a cyber intrusion days after the campaign declared it had been hacked by Iran.

The FBI released a brief statement reading, “We can confirm the FBI is investigating this matter.”

The campaign provided no specific evidence of Iran’s involvement, but the claim came shortly after Microsoft issued a report detailing foreign agents’ attempts to interfere in the U.S. campaign in 2024. The report cited an instance of an Iranian military intelligence unit in June sending “a spear-phishing email to a high-ranking official of a presidential campaign from a compromised email account of a former senior advisor.”