Breitbart and a former Trump aide have been accused of doxxing the FBI agents involved in the Mar-a-Lago raid.
Breitbart published an unredacted search warrant and Garrett Ziegler shared the agents' names on social media.
Others involved in the Mar-a-Lago raid have been facing threats and harassment.
Right-wing media outlet Breitbart News and a former Trump aide have been separately accused of doxxing the FBI agents involved in the Mar-a-Lago raid.
The Breitbart News website revealed the identities of two agents on Friday when it published a leaked copy of the warrant that authorized the search.
The version officially released hours later redacted the agents' names from the inventory receipt section of the warrant.
Doxxing is defined as publishing private or identifying information about a particular individual on the internet, often with malicious intent.
Hours later, Garrett Ziegler, a former aide to then-President Trump's trade adviser, took to social media to also name the agents, The Daily Beast reported.
"This is one of the two feds who signed the 'Receipt for Property' form, which detailed-at a very high level-the fishing expedition that the FBI performed at Mar-a-Lago," Ziegler wrote on both Truth Social and Telegram, per the outlet.
Along with the message, Ziegler shared the FBI agents' date of birth, work emails, and supposed links to family members' social media accounts, according to the outlet.
The post is no longer available on Truth Social, but parts are still up on his Telegram channel at the time of writing.
According to The Daily Beast, Ziegler complained in a now-deleted post that Truth Social had taken down his post for "no reason."
He later lashed out at The Daily Beast reporter Zachary Petrizzo for writing the story.
"I'm proud of providing transparency to the 100 million people who think what the FBI is doing is illegal and sick. It needs to stop. Providing agents' work emails is not doxing, nor a violation of 18 USC 119," he wrote on Truth Social.
Ziegler also posted images and information about Judge Bruce Reinhart, who approved the search warrant.
Reinhart has received violent and antisemitic threats since approving the warrant, which led to his synagogue canceling its Shabbat service.
A man was also shot dead by police on Thursday after he tried to force entry into an FBI field office in Cincinnati, Ohio, after posting angry messages about the Mar-a-Lago raid on social media.
A law enforcement source told CNN that the FBI is investigating an "unprecedented" number of threats against personnel following the Mar-a-Lago raid.
The FBI and Ziegler did not immediately respond to Insider's request for comment.
On Thursday, Attorney General Merrick Garland announced that he had asked a court to unseal the search warrant the FBI received before searching Trump's Florida estate.
The attorney general cited the "substantial public interest in this matter" in announcing the request at a Justice Department news conference.
He added: "Let me address recent unfounded attacks on the professionalism of the FBI and Justice Department agents and prosecutors. I will not stand by silently when their integrity is unfairly attacked.
The men and women of the FBI and the Justice Department are dedicated, patriotic public servants."