The Wall Street Journal, also citing unidentified sources, said the intelligence described a “fresh” plot.
Tehran has for years vowed to hit back at Trump for ordering the assassination of Iranian general Qassem Soleimani in January 2020, during his first term.
When Agence France-Presse contacted the White House about the reports, an unidentified official pointed to Trump’s remarks from Wednesday.
“They want to take out the US leader — me. I’m on whatever list. I saw this morning I’m on every single one of their lists,” Trump told reporters aboard Air Force One as he flew home from a NATO summit.
Trump used his old Air Force One plane to leave Turkey, where the summit took place, sending his new Qatari-gifted jet on ahead to Britain, where he switched planes for the journey to Washington.
The switch from the new jet on its maiden foreign trip sparked speculation it was because its security features were lacking — particularly as the US launched fresh strikes against Iran, which borders Turkey.
The New York Times reported late Wednesday that the switch was made at the request of the US Secret Service “as a security precaution.”
In a press conference, Trump sidestepped safety questions but alluded to previous alleged assassination attempts by Iran.
Meanwhile, dozens of missiles and drones fired by Iran caused no significant damage or injuries to American personnel, a US defense official said.
They “were intercepted or failed to cause major damage,” the official said on condition of anonymity, adding that there were “no US injuries.”
Explosions were heard over the Bahraini capital of Manama on Thursday morning and air raid sirens sounded for a third time after Iran’s military said it had targeted sites in the Gulf kingdom as well as in Kuwait and Qatar.
Earlier, Iran’s Revolutionary Guards said they had struck “key infrastructure and facilities” at US bases in Arifjan and Ali Al Salem in Kuwait, and Juffair and Sheikh Isa in Bahrain.
Two days of US strikes against Iran have killed 14 people and injured 78, Tehran’s health ministry said on Thursday.
Separately, Ahmad Nafisi, deputy provincial governor of southern province of Hormozgan, said Thursday that US strikes in the fishing port town of Sirik killed three people and injured 15 more, state TV reported.