Minnesota police arrested an intruder near the premises of UnitedHealthcare headquarters on Monday, more than four months after Luigi Mangione fatally shot CEO Brian Thompson in New York City.

The Minnetonka Police Department initially announced there was a “large police presence” at the health insurance company’s campus in Minnesota. Less than an hour later, the police department said the suspect had been “placed into custody without incident” and that there is no ongoing “threat to the public.”

Authorities did not immediately release any further details, including the suspect’s identity or his possession of weapons. The FBI and Minnetonka police are leading the investigation.

“The call was about somebody who should not be on the campus,” City of Minnetonka spokesman Andrew Wittenborg told the Minnesota Star Tribune. He declined to say whether the incident was related to the killing of the company’s chief executive late last year.

“We just don’t know,” the city staffer said.

Mangione was accused of killing Thompson outside a Manhattan hotel in December before fleeing the city to central Pennsylvania, where he was apprehended by local authorities after an individual alerted the police. The nationwide manhunt lasted five days. Mangione is being held at a federal detention center in Brooklyn, as he awaits trial.

The criminal defendant faces three separate trials: the first in New York for first-degree murder in furtherance of terrorism, the second for federal charges involving murder by firearm, and the third in Pennsylvania for illegal gun possession, among other charges.

Earlier this month, U.S. Attorney General Pam Bondi announced the Department of Justice is seeking the death penalty for Mangione. The federal charges for using a firearm to commit murder and for interstate stalking resulting in death make him eligible for the death penalty if convicted.

Federal prosecutors called Mangione’s murder an “act of political violence” that “may have posed grave risk of death to additional persons.” The defense opposes the intended use of capital punishment against their client, accusing the Trump administration of trying to kill Mangione as a “political stunt.”

Mangione has pleaded not guilty to state charges but has yet to enter a plea for federal charges as he has not been indicted in the federal case yet. He is due for an appearance in federal court this Friday, followed by a New York state court hearing on June 26.

Mangione allegedly committed the murder because he harbored resentment toward the health insurance industry, possibly exacerbated by his debilitating back injury. Authorities have not fully determined his motive, though his manifesto suggests the political motivation stemmed from his hatred of “parasitic” healthcare companies.

The man has unusually amassed a number of followers, who likewise hate the healthcare industry. His supporters have described Mangione as a “political prisoner” and even contributed to his own legal defense fund.

Journalist Taylor Lorenz, for instance, called Mangione a “morally good man” in spite of his murder of an executive. Her comments, which aired in a CNN segment on Sunday, sparked outcry on social media.

The words “deny,” “defend,” and “depose” were found on shell casings of the bullets used to kill Thompson at the crime scene — a common phrase used by critics of the healthcare industry.