By Brendan O'Brien
(Reuters) - The U.S. government has tracked activists and journalists involved in the migrant caravan from Central America at the end of 2018, NBC News reported on Wednesday.
The documents listed 10 journalists, an attorney and 47 people, some of whom were said to be possible organizers and instigators from the United States and elsewhere. The NBC affiliate in San Diego, KNSD-TV, said it received the documents from an unidentified source in the Department of Homeland Security.
The documents dated Jan. 9, 2019 were titled "San Diego Sector Foreign Operations Branch: Migrant Caravan FY-2019, Suspected Organizers, Coordinators, Instigators and Media," according to NBC 7 in San Diego.
At least three journalists and the attorney listed on the documents were unable to enter Mexico to work due to alerts placed on their passports and others have been subject to secondary screenings when crossing the border, the news station reported.
Reuters did not see the documents and was unable independently to corroborate NBC's findings. One of the journalists that the station said was listed was Go Nakamura, a photographer who has done several freelance assignments for Reuters and began covering the caravan on Nov. 10.
The U.S. Department of Homeland Security referred questions on the report to U.S. Customs and Border Protection (CBP).
"It is protocol following these incidents to collect evidence that might be needed for future legal actions and to determine if the event was orchestrated," CBP said in a statement to NBC 7.
A Reuters spokesperson said: "We are concerned by this report and are seeking more information on the matter."
Thousands of migrants from Central America reached the San Ysidro Port of Entry in south San Diego County in November.
At one point, U.S. authorities fired tear gas at the migrants and shut down the country's busiest border crossing after U.S. President Donald Trump vowed the asylum-seekers would not easily enter the United States.
Trump has frequently criticized journalists and described news reports that contradict his opinion or policy positions as "fake news."
The White House did not immediately respond to a request for comment on the NBC 7 report.
Immigration officials dubbed the effort to monitor the migrant caravan "Operation Secure Line," the source told the station.
The documents showed a photograph of each individual, a description of their identity and their alleged involvement in the caravan. They also show whether officials placed an alert on the individual's passport, the station reported.
(Reporting by Brendan O'Brien in Milwaukee; Editing by Daniel Wallis and David Gregorio)