Mexican boxer Julio Cesar Chavez Jr., son of the legendary fighter, has been arrested and is being processed for "expedited removal" from the United States due to alleged ties to the Sinaloa Cartel, the Department of Homeland Security announced Thursday.

(Reuters) -Mexican boxer Julio Cesar Chavez Jr. has been arrested by u.s. immigration officers and is being processed for expedited removal from the country, the Department of Homeland Security said in a statement on Thursday.

Attacks perpetrated by lone actors are the biggest terrorism threat to July 4th festivities in New York City and elsewhere, federal authorities said in a threat assessment obtained by CNN.

In a joint bulletin, the FBI, Department of Homeland Security and other law enforcement agencies said individuals or small groups motivated by political, racial or personal grievances are most likely to target large gatherings like the Macy’s fireworks show in New York City, or other celebrations across the country.

"We are enhancing security measures and coordinating intelligence-sharing to proactively address potential risks," a DHS spokesperson told Newsweek.