A Michigan defense lawyer is disputing FBI Director Kash Patel’s allegations that his 20-year-old client and four other young suspects were planning to carry out a terror attack on Halloween weekend.

Announcing their arrests on Friday, Patel said more information would be coming soon, however the FBI and Michigan authorities have offered few details about the case. Spokespersons for the state and national FBI and the U.S. Attorney in Detroit did not immediately respond to messages Saturday.

The investigation involved discussion in an online chat room involving at least some of the suspects who were taken into custody, according to two people briefed on the investigation who could not publicly discuss details. They spoke to The Associated Press on condition of anonymity. The group allegedly discussed carrying out an attack around Halloween, referring to “pumpkin day,” according to one of the people. The other person briefed on the investigation confirmed that there had been a “pumpkin” reference.

However, lawyer Amir Makled, who represents a man from the suburb of Dearborn who was still detained on Saturday, said federal authorities haven’t given him many details about the investigation but after reviewing the matter, he concluded that no terror event was planned. He said he doesn’t expect any charges will be filed.

“I don’t know where this hysteria and this fearmongering came from,” Makled said.

He described the all-male group of U.S. citizens as gamers, and said they range in age from 16 to 20.

“If these young men were on forums that they should not have been on or things of that nature, then we’ll have to wait and see,” Makled said. “But I don’t believe that there’s anything illegal about any of the activity they were doing.”

Authorities said Friday after the arrests were made that there was no further threat to public safety. Patel had announced in a post on X that “the FBI thwarted a potential terrorist attack and arrested multiple subjects in Michigan who were allegedly plotting a violent attack over Halloween weekend.”

Investigators allege the plan was inspired by Islamic State group extremism. It wasn’t immediately clear if the had the means to carry out an attack, but the reference to Halloween prompted the FBI to make arrests Friday, one of the people familiar with the investigation told the AP.

Patel credited the vigilance of the FBI, along with help from local authorities, with thwarting the plot.

Since the 9/11 terror attacks, the FBI has foiled several alleged attacks through sting operations in which agents posed as terror supporters, supplying advice and equipment.

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Associated Press writers Mike Balsamo and Eric Tucker in Washington and Jacques Billeaud in Phoenix contributed to this report.