“Empire” star Jussie Smollett was so irked that a racist threat letter he says was sent to him didn’t spark public outrage that he hired two men to stage a hate attack on him, according to reports Monday.

Multiple sources with direct knowledge of the investigation pointed to the letter as a potential motive in the actor-singer’s increasingly baffling case, CBS’ Chicago affiliate reported.

“When the letter didn’t get enough attention, he concocted the staged attack,” a source told CBS.

That was the story brothers Olabinjo and Abimbola Osundairo told police. They also said they were hired by Smollett as the “attackers,” according to the ABC station in Chicago.

Investigators are probing the information that the Osundairo brothers gave them about the letter allegedly motivating the bogus attack, but they have not yet confirmed it.

Cops are seeking to reinterview Smollett, but the actor did not meet with them Monday.

“Smollett’s attorneys will keep an active dialogue going with Chicago police on his behalf,” the star’s attorneys, Todd Pugh and Victor Henderson, said in a joint statement.

A grand jury is scheduled on Tuesday to start weighing indictment charges of filing a false police report against Smollett, but the proceeding may be postponed for cops to continue gathering evidence, TMZ reported.

The Osundairo brothers will testify voluntarily and have not received immunity from prosecution.

The development is only the latest twist in the bizarre narrative surrounding the alleged attack on Smollett.

He initially claimed he was walking home from a Subway restaurant in Chicago at 2 a.m. Jan. 29 when he was accosted by two men who shouted racial slurs, tied a noose around his neck and doused him with a “chemical substance” resembling bleach.

A week before he was allegedly attacked, Smollett claimed he received a suspicious letter at Fox Studios in Chicago.

“You will die black f-g,” read the message, written with letters cut out from a magazine.

The letter was opened on Jan. 22 and featured a photo of a stick figure apparently hanging from a tree and a gun pointing at it. “MAGA” was scrawled in red letters on the envelope.

The letter also contained a white powdery substance, which prompted a hazmat response.

Chicago police said the substance was later determined to be pulverized aspirin. The FBI has taken over the probe into the letter.

Smollett, 36, was upset that the news of the letter didn’t get a “bigger reaction,” sources told the CBS station.

However, it was still not clear on Monday whether the letter was a part of Smollett’s alleged hoax or a legitimate threat.

A magazine was seized during a raid on the Osundairos’ home by Chicago cops last week. It wasn’t clear if cops were attempting to link the magazine to the letter sent to Smollett.

Police also took a sample of writing from the brothers and a wallet containing a book of postage stamps, CBS reported, citing police evidence logs from the raid.

The Osundairos on Monday made their first public statement since being identified in the Smollett saga.

“We are not racist. We are not homophobic, and we are not anti-Trump. We were born and raised in Chicago and are American citizens,” they told CBS in a statement.

The siblings admitted to cops that they rehearsed the attack against Smollett — and even scouted locations with him beforehand, TMZ reported, citing law enforcement sources.

They reportedly chose a spot near Smollett’s apartment in the ritzy Streeterville neighborhood because Smollett allegedly believed a surveillance camera would capture the attack. Police later found that the camera actually picked up nothing because it was pointed in the wrong direction.

Smollett allegedly informed the pair that he wanted the assault to be a “physical thing” but warned them that he didn’t want to be seriously injured, TMZ reported.

It added that the Osundairos told cops they “made contact” with Smollett’s face but it was “weak.”

Cops believe Smollett may have been posting stories on Instagram to tip off the Osundairos to his whereabouts in the hours before the attack, according to the Daily Mail.

Olabinjo and Abimbola were arrested last Wednesday but released without charges two days later as police revealed new evidence in the case had “shifted the trajectory” of their investigation.

Additional reporting by Gabrielle Fonrouge