The FBI Director, Kash Patel, has announced a significant development in the investigation of a thwarted terror plot in Michigan over the Halloween weekend, with the arrest of a sixth suspect.

This latest arrest involves a suspect from Washington state who is alleged to have provided material support inspired by ISIS activities. NBC News has identified the individual as 19-year-old Saed Ali Mirreh from Kent, Washington, who was apprehended by the FBI on Wednesday.

In addition to Mirreh, authorities have taken into custody three men from Michigan and two from New Jersey. Among them is Ayob Nasser, also 19 years old, who was detained on Wednesday. Nasser is accused of being involved in planning potential attacks targeting LGBTQ+ bars in the suburbs of Detroit.

According to court documents, Nasser, along with his brother Mohmed Ali and another accomplice Majed Mahmoud, are facing charges of conspiracy. They are accused of providing material support and resources to a designated terrorist organization and involved in the illicit handling of firearms and ammunition for terrorist purposes.

Nasser, his brother Mohmed Ali and Majed Mahmoud are charged with conspiracy to provide material support and resources to a designated terrorist organization and receiving and transferring guns and ammunition for terrorism, according to court documents.

Mohmed Ali and Majed Mahmoud were arrested Friday. Investigators say two minors, identified only as Person 1 and Person 2 in court documents, were also involved in the discussions.

Court documents say Ali and an unnamed juvenile were referenced in third-party conversations on an encrypted communication app, and the “brothers” were allegedly planning to conduct a terror attack in the U.S. on behalf of ISIS. Ali is also accused of purchasing a shotgun, an AR-15-style rifle and multiple firearms accessories, including a device that allows a shooter to increase the rate of fire on a semiautomatic weapon.

Mahmoud purchased 1,600 rounds of ammunition to be used in AR-15-style rifles during the attack, according to the documents. The complaint says Ali and Mahmoud scouted locations for an attack in Ferndale, Michigan, a suburb of Detroit, and appeared to set the date for the attack for Halloween.

In New Jersey, authorities said Tomas Kaan Jimenez-Guzal, 19, and Milo Sedarat were taken into custody. Records revealed Sedarat’s father appears to be Roger Sedarat, an award-winning Iranian American poet and professor.

Officials said Jiminez-Guzal had talked about wanting to train with the Islamic State terrorist group and had planned to fly to Turkey before attempting to go to Syria.