The White House on Wednesday asked Congress to allocate an extra $4.5 billion in emergency funding to deal with the crisis along the southern border.

The request includes $3.3 billion for humanitarian assistance, which the administration said would be used to increase shelters and care for unaccompanied minors, in addition to processing arrivals. About $1.1 billion would go toward other border operations like expanding the number of detention beds and providing more investigation resources.

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The $1.1 billion includes $377 million for the Pentagon , which is providing logistical and active-duty support at the border.

The remaining $178 million would go toward technological upgrades and paying law enforcement.

A White House official said Wednesday that the administration could not use reprogrammed Department of Defense (DOD) funds from the emergency declaration to aid the humanitarian situation at the border. “The idea that you’d take DOD funds and shift them to [Department of Homeland Security] DHS is outside the scope of [emergency declaration] authority,” a senior administration official said.

The White House funding request came a day after acting Homeland Security Secretary Kevin McAleenan told lawmakers that current funding, which was signed into law in March, would run out before the fiscal year ends on Sept. 30.

“Given the scale of what we’re facing, we will exhaust our resources before the end of this fiscal year," he said.

Wednesday's request said funds for dealing with unaccompanied children crossing the border into the U.S. will run out by June.