Roughly 250 active duty U.S. military personnel will be transferred from Arizona to Eagle Pass, Texas, to help reinforce the ports of entry in the area, the Pentagon announced Wednesday.

The Department of Homeland Security requested the additional troops in response to a migrant caravan near the Texas border.

"Acting Secretary of Defense Shanahan has authorized the repositioning of approximately 250 active duty military personnel to the vicinity of the Eagle Pass [points of entry]," Pentagon spokesman Capt. Bill Speaks said in a statement Wednesday. "This personnel includes military police and medical personnel from current border security support missions in Arizona, and engineers who will support hardening of these POEs."

The 250 troops are already supporting border missions as part of the approximately 2,400 troops currently stationed at the border. They are separate from the 3,750 additional U.S. forces the Pentagon announced on Sunday would be heading to the border to support Customs and Border Protection.

According to Department of Homeland Security Secretary Kirstjen Nielsen, 2,000 migrants are headed toward Texas after arriving in northern Mexico. She said that "illegal entry will not be tolerated and we stand ready to prevent it." Guatemalan Consul Tekandi Paniagua in Del Rio, Texas, said Monday that the migrants are from Honduras, Guatemala, and El Salvador.

[Related: Mexico halts program for temporary asylum requests after another caravan forms]

President Trump referenced the caravan in his State of the Union address on Tuesday evening and pressured Congress to combat "an urgent national crisis."

"Now is the time for Congress to show the world that America is committed to ending illegal immigration and putting the ruthless coyotes, cartels, drug dealers, and human traffickers out of business," Trump said.

Trump has called for $5.7 billion to construct a border wall. Democrats have not gotten on board with the proposal, and the dispute prompted a 35-day partial government shutdown.