There are three caravans now moving through Mexico, with between 7,000 and 10,000 migrants. Officials said Friday that one caravan member, a 46-year-old Honduran man convicted of murder, was arrested trying to cross the border illegally. "Because I live on the line, they both want to kill me", he said.
"This caravan has proven they have a propensity for violence and the American people agree: violence against our frontline law enforcement will not be tolerated", Waldman said.
US authorities say assailants threw a "hail of rocks" at agents, striking four who escaped serious injury.
Images and video of asylum seekers, including families with small children, running from the tear gas prompted widespread outrage against the Trump administration, with the Mexican government itself calling for an investigation into the use of nonlethal weapons.
Many others were not referred to the Justice Department because they were children or parents accompanying children, the official said.
Border Patrol officials reported 786 assaults against agents in fiscal year 2017, a spike of 73 percent over fiscal year 2016, even though apprehensions fell from 415,816 to 310,532. About 1,000 tried to rush the border and illegally cross into the U.S., Border Patrol chief Carla Provost said.
The suspect allegedly admitted to being from El Salvador and entering the USA without authorization.
Street by Saudi US embassy could be renamed 'Jamal Khashoggi Way'
In the video, the Saudi prince can be heard telling the French president "Don't worry", to which he replies, "I am anxious ". Saudi Arabia's public prosecutor has said the Crown Prince knew nothing of the operation to kill Khashoggi.
After walking and hitch-hiking more than 4,000 kilometers (2,500 miles) to the United States southern border, some 500 migrants tried to breach it on Sunday.
US authorities are working on a new system to better record evidence if similar circumstances arise in the future, the official said.
A group of Central American migrants -mostly from Honduras- get over a fence as they try to reach the US-Mexico border near the El Chaparral border crossing in Tijuana, Baja California State, Mexico, on November 25, 2018. They briefly escaped and were captured.
The department announced Friday that the man, who was identified as 30-year-old Wuilson Lazo-Ramos, was arrested near Ajo, Arizona.
This suspect will also face charges for assaulting a federal agent.
More than one-third of the 6,000 migrants in Tijuana, Mexico, are suffering from serious health issues, including tuberculosis, chickenpox, HIV/AIDS, and respiratory infections, Fox News reported.
"Consistent with the president's direction to do all within our authority to secure U.S. borders, I am seeking your assistance and ask you to prioritize efforts to help us prevent illegal entry into the United States", Nielsen wrote.