Other US troops could be deployed on the US-Mexico border to modernize 160 km of fences.
Three unnamed US officials told NBC News that the Department of Homeland Security has requested additional troops from Acting Secretary of Defense Patrick Shanahan.
The Ministry of Defense is not affected by the partial shutdown of the government, and the cost of building a fence would come from the Pentagon's annual budget.
The Trump administration announced plans to deploy thousands of active-duty troops at the border in late October, in response to migrants crossing Mexico from the north.
These troops supported US Customs and the US border. Protective efforts by assisting with surveillance, reinforcing barriers, providing medical support and temporary housing.
Prototypes of the Border Wall of President Donald Trump:
23 PHOTOS
Prototypes of the Border Wall of President Donald Trump [19659010] View Gallery
A Police Officer Borders stands near some of the eight Protective Wall prototypes of US President Donald Trump while they are nearly completed along the US-Mexico border in San Diego, California on October 23, 2017. REUTERS / Mike Blake 19659012] Federal agents patrol alongside eight border wall prototypes of US President Donald Trump as they are nearly completed along the US-Mexico border in San Diego, California, United States, October 23, 2017. REUTERS / Mike Blake
One of eight border wall prototypes of US President Donald Trump is photographed along the US-Mexico border near San Diego, California, USA United States, October 23, 2017. REUTERS / Mike Blake
Seven of the eight border wall prototypes of US President Donald Trump are nearing completion along the US-Mexico border near San Diego , California, October 23, 2017. REUTERS / Mike Blake
One of eight border wall prototypes of US President Donald Trump appears on the photo US-Mexican border near San Diego, California, United States , October 23, 2017. REUTERS / Mike Blake
Two of the eight front wall prototypes of US President Donald Trump are nearing completion along the US-Mexico border near San Diego, California, USA. United 23 October 2017. REUTERS / Mike Blake
A prototype of the border wall of US President Donald Trump with Mexico is visible behind the current protective barrier on this photo taken on the Mexican side of the Tij border uana, Mexico, 12 October 2017. REUTERS / Jorge Duenes
A prototype of the border wall of US President Donald Trump with Mexico is visible in this photo taken on the Mexican side of the border in Tijuana, Mexico, October 12, 2017 REUTERS / Jorge Duenes
The walls of the border between US President Donald Trump and Mexico are almost finished behind the current barrier of protection, in this photo taken on the Mexican side of the border, in Tijuana, Mexico, October 23, 2017. REUTERS / Jorge Duenes
Three of the eight border wall prototypes of US President Donald Trump are nearing completion along the US-Mexico border in San Diego, California, United States, on October 23, 2017. REUTERS / Mike Blake
Prototype of US President Donald Trump The border wall with Mexico is depicted in this photo taken on the Mexican side of the border, Tijuana, Mexico, October 23, 2017. REUTERS / Jorge Duenes
Prototypes of the border wall of US President Donald Trump with Mexico are almost completed in this photo taken on the Mexican side of the border, Tijuana , Mexico, October 23, 2017. REUTERS / Jorge Duenes
People are working in San Diego, California, USA, on the US President Donald Trump's Border Wall Prototype Construction Site with Mexico, on this photo taken on the Mexican side of the border in Tijuana, Mexico, on October 3, 2017. REUTERS / Jorge Duenes
People work in San Diego, California, USA, on the construction site October 3, 2017 REUTERS / Jorge Duenes
People work in San Diego, California, USA, in San Diego, California, United States. This photo was taken from the Mexican side of the border in Tijuana (Mexico). the prototype construction site for the border wall of US President Donald Trump with Mexico, on this photo taken on the Mexican side of the border in Tijuana, Mexico, October 3, 2017. REUTERS / Jorge Duenes
People are working In San Diego, California, We at the US President Donald Trump's border wall prototype site with Mexico, on this photo taken on the Mexican side of the border in Tijuana, Mexico, on October 3, 2017. REUTERS / Jorge Duenes THE IMAGES OF THE DAY OF TPX
People work in San Diego, California, USA, on the prototype construction site of the border wall of US President Donald Trump with Mexico, in this photo taken on the Mexican side of the border in Tijuana, Mexico, October 3, 2017. REUTERS / Jorge Duenes
People (D) works in San Diego, California, USA, on the construction site of the wall-fro prototypes Head of US President Donald Trump with Mexico, on this photo taken on the Mexican side of the border in Tijuana, Mexico, October 3, 2017. REUTERS / Jorge Duenes
People work in San Diego, California, USA United, on the prototype of the border wall of US President Donald Trump with Mexico, on this photo taken on the Mexican side of the border in Tijuana, Mexico. ico 3 October 2017. REUTERS / Jorge Duenes
The walls of Mexico on the border between US President Donald Trump and Mexico are visible behind the current separation barrier on this photo taken on the Mexican side of the border in Tijuana, at Mexico, October 12, 2017. REUTERS / Jorge Duenes IMAGES OF THE DAY TPX
The wall of Mexico on the border between the President of the United States, Donald Trump, is visible behind the current barrier of protection, in this photo taken from the Mexican side of the border in Tijuana, Mexico, October 12, 2017. REUTERS / Jorge Duenes
A prototype of the border wall of US President Donald Trump with Mexico is featured in this photo taken on the Mexican side of the border in Tijuana , Mexico, October 12, 2017. REUTERS / Jorge Duenes
A prototype for the United States The border between President Donald Trump and Mexico is visible in this photo taken from the Mexican side of the border in Tijuana, Mexico, on October 12, 2017. REUTERS / Jorge Duenes
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No Some of these troops would have returned home, but the approximately 2,300 people still on the southern border should remain there until the end of January.
NBC News sources say this recent DHS request could extend the mission until September. , although. It would be up to the Pentagon to decide whether the troops it deploys are on active duty or are part of the National Guard.
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