Andrew Tate and his brother Tristan Tate were taken into custody Saturday in Miami by U.S. Marshals acting on a sealed warrant, as British authorities announced a major expansion of criminal charges against the controversial social media influencers and formally requested their extradition to the United Kingdom.

The arrests occurred outside the James L. Knight Center in downtown Miami, where Andrew Tate had been scheduled to appear at a bare-knuckle boxing event. Photos and video published by TMZ showed federal agents handcuffing the brothers. A Justice Department spokesperson confirmed that the arrests were made pursuant to extradition proceedings and in accordance with treaties and law enforcement agreements governing Justice Department extraditions.

The developments came hours after Britain's Crown Prosecution Service approved a significant expansion of the criminal case against the brothers. Bedfordshire Police said the new charges bring the total against the brothers to 59, with Andrew Tate facing 42 charges and Tristan Tate facing 17. According to the CPS, Andrew Tate now faces additional charges including rape, arranging or facilitating trafficking for sexual exploitation, assault occasioning actual bodily harm, and offenses involving alleged indecent images of a child and extreme pornography. Tristan Tate also faces additional rape, sexual assault, and trafficking charges.

The alleged crimes span from 2010 to 2017 and involve four additional alleged victims, bringing the total number of alleged victims in the U.K. case to seven. Malcolm McHaffie, head of the CPS Special Crime Division, said in a statement that the CPS has requested the extradition of the Tates from the United States and that they have been arrested and await extradition proceedings to the U.K.

A law enforcement source told Fox News Digital that the charges stem from the United Kingdom and that the arrest warrant is expected to be unsealed to reveal the U.K. charges. The brothers are expected to make an initial appearance in the U.S. District Court for the Southern District of Florida early next week.

Assistant Chief Constable Karena Thomas of Bedfordshire Police said investigators had worked closely with prosecutors and international law enforcement agencies throughout the case. «There is no place for male violence against women and girls, and we will continue to work tirelessly to support victims and investigate all reports made to us,» Thomas said.

Andrew and Tristan Tate have denied wrongdoing. The brothers, who hold dual U.S. and British citizenship, rose to fame as «manosphere» influencers, building millions of followers with content promoting hypermasculinity and male non-monogamy. They have denied criminal allegations filed against them in Romania and the United Kingdom.

Neither the U.S. Marshals Service nor the Justice Department has publicly identified the basis for Saturday's sealed warrant, according to the Associated Press. The brothers' attorney did not immediately respond to requests for comment.

The arrests mark the latest chapter in a series of legal troubles for the Tates. The brothers were previously detained in Romania in December 2022 on charges of human trafficking, rape, and forming an organized crime group. They were released from house arrest in August 2023 but remain under judicial control and face ongoing proceedings in Romania. The new U.K. charges add a significant layer of complexity to their legal situation, as they now face potential extradition to Britain while still under investigation in Romania.

The case has drawn international attention due to the brothers' large online following and the serious nature of the allegations. Andrew Tate, a former professional kickboxer, has amassed millions of followers across social media platforms with content that critics say promotes misogyny and toxic masculinity. The brothers have consistently maintained their innocence, characterizing the legal actions against them as a coordinated attack on their views and lifestyle.