Postal carrier Iran Becton said he was the victim of a racist, anti-gay prant at the University of Chicago, according to the Chicago Sun-Times.

Members of the Phi Delta Theta fraternity at the University of Chicago were involved in a prank that had Becton needlessly dragging 79 postal supply boxes up to doors of the frat house. The items were addressed to “Reggin Toggaf;” written backward, the first name is a racial slur and the surname is a slur for gay men.

On its website, the fraternity issued a statement: “Several weeks ago, several dozens of USPS priority mail boxes labeled with a derogatory name were delivered to the chapter house from an unknown sender. After receiving the boxes, the active brotherhood immediately filed a complaint with USPS, as involved federal agents can confirm.

“While we were not responsible for this heinous and blatantly racist and homophobic federal offense, we are deeply saddened and sincerely apologize for any emotional distress caused to Mr. Iran Becton—the individual who delivered the boxes—as a result of this situation.

“We are fully cooperating with the authorities and the University administration in order to resolve this issue and hold accountable those responsible to the fullest extent of the law.”

The fraternity’s mail delivery has been put on hold until the fraternity sends a written apology to the letter carrier.