4 Additional Suspects Charged Over ISIS-Inspired Halloween Terror Plot

The FBI said it has had agents monitoring the suspects for weeks.

An FBI agent stands by an Evidence Response Team truck outside a home in a Dearborn, Mich., neighborhood on Oct. 31, 2025. Mike Householder/AP Photo

Four more males suspected of plotting an ISIS-inspired Halloween terror attack on American soil have been arrested and charged, according to the FBI on Nov. 5. Two of the suspects were charged in New Jersey, one in Washington, and another in Michigan.

Acting U.S. Attorney for the District of New Jersey Alina Habba said in a video posted to X that her office had charged two individuals alleged to be connected to the plot, in which two suspects were charged in Michigan earlier this week.

The New Jersey suspects have been identified as Tomas Kaan Jimenez-Guzal, 19, and Milo Sedanet, 19, both of Montclair.

Habba said that Jimenez-Guzal has been charged with material support to ISIS, which is a designated terrorist organization, and Sedanet with two counts of transmitting threats to interstate and foreign commerce, including “anti-Semitic messages advocating violence.”

A third suspect from Kent, Washington, has also been taken into custody over alleged involvement in the terror plot, Habba said.

Court documents detailing the charges were not immediately available.

FBI Director Kash Patel thanked Habba for “pursuing justice” and helping to “save lives and keep Americans safe” with the New Jersey arrests.

“Two additional suspects have been charged in connection with the alleged Halloween terror plot in Detroit last week,” he said in a post on X.

The FBI also named an additional co-conspirator, Ayob Nasser, 19, from Michigan. Nasser was arrested and charged on Nov. 5 over the Halloween plot.

Prosecutors in the court documents allege that Nasser traveled to an amusement park with a co-conspirator in the Midwest, approximately three hours from Dearborn, Michigan, to scout a location for suitability for the group’s plot. They also said that a computer at the home of Nasser and his brother revealed that someone had searched “is it crowded on halloweekend” from that amusement park.

“Today FBI Detroit and partners arrested a third additional suspect in connection to the alleged foiled terrorist attack in Michigan last week. Our investigation suggests this individual had been providing material support in preparation for the attack, inspired by ISIS. They are now in custody,” FBI deputy director Dan Bongino said in an X post. “Thank you to the men and women who continue to work this case diligently.”

The four join the two other male suspects who were charged in Michigan earlier this week over the alleged terror plot targeting LGBT-friendly venues near Detroit.

Nasser’s brother, Mohmed Ali, 20, and Majed Mahmoud, 20, were charged on Nov. 3 with conspiracy to provide material support and resources to a designated terrorist organization and receiving and transferring firearms and ammunition for terrorism over the plot, according to court documents.

The pair in Michigan was arrested on Oct. 31 after FBI agents had monitored them for weeks. Agents found various weapons, ammunition, and tactical gear at their residences on Oct. 31 and in a storage unit that Ali was renting.

“According to the complaint, subjects had multiple AR-15 rifles, tactical gear, and a detailed plan to carry out an attack on American soil,” Attorney General Pam Bondi wrote on social media. “Our American heroes prevented a terror attack.”

William Swor and Amir Makled, the defense attorneys for Ali and Mahmoud, declined to comment after the court appearance on Nov. 3. Over the weekend, Makled suggested that the allegations were coming from “hysteria” and “fear-mongering.”

The pair has a detention hearing scheduled for Nov. 10.

Swor and Makled also declined to comment on Nov. 5 on Nasser’s arrest. Both said they were reading through an amended 93-page complaint filed in federal court.

Five of the six co-conspirators allegedly practiced shooting at gun ranges on at least five separate instances in September and October, according to the Michigan complaint. The FBI said it believed these exercises were to “develop their firearm skills in furtherance of an attack.”

The suspects also allegedly kept in regular communication and talked to other individuals that authorities believe had knowledge of the “potential attack plans and related information.”

The court filing says Person 1 regularly consulted the father of a “local Islamic extremist ideologue” about when to commit a “good deed.”

The group used online encrypted communications and social media apps to share “extremist and ISIS-related materials that encourage attacks similar to what they planned,” the FBI alleged.

According to the Michigan complaint, in September, FBI agents interviewed one of the co-conspirators who they said admitted to being a member of the chat groups “Islamic State Lasting” and “Islamic State of America” on the Discord social media platform. The “Islamic State of America” chat group contained messages about alleged plans to attack the Chicago Pride Parade on June 8.

Phone records also showed members of the group looked up information on various mass killings, including the 2016 Pulse nightclub shooting and the deadly 2025 New Orleans truck attack, the court documents show.