U.S. officials say the Pentagon will begin deploying as many as 1,500 active duty troops to help secure the southern border in the coming days.

The order will deploy 1,500 troops to build physical barriers, but they will not be used for law enforcement, a military official says.

The Pentagon will send 1,500 active-duty troops to the southwestern border by the end of the month, a Defense Department official said on Wednesday, helping to fulfill one of President Trump’s main goals to stem the flow of migrants into the United States.