Updated at 5:05 p.m. ET
The U.S. military will send approximately 5,000 support troops to the U.S.-Mexico border, the Pentagon announced on Monday.
The exact number could be slightly higher or lower, a Pentagon official told NPR. The official said the deployment is being done to support the Department of Homeland Security and Customs and Border Protection.
The uniformed troops are likely to be active-duty Army personnel, with perhaps some members of the Army Reserve and Marines. There are already 2,100 National Guard members deployed to the border.