SAN DIEGO (AP) — A federal appeals court has heard arguments to halt the military-funded construction of President Donald Trump's border wall with Mexico.

American Civil Liberties Union attorney Dror Ladin told a panel of the 9th U.S. Circuit Court of Appeals in San Francisco that the administration is building it quickly since the Supreme Court denied an emergency plea in July to temporarily put construction on hold.

RELATED: CBP releases statement on cactus bulldozed for border construction projects

The ACLU says the wall is going up in Organ Pipe National Monument in Arizona, more bulldozers are being dispatched and large amounts of water are being used to make concrete.

Ladin says the ACLU would ask for the wall to be demolished if the group wins its case after it is built.

The administration says Trump was allowed to divert Pentagon funds to build it.

RELATED: 'We're building a wall in Colorado,' Trump says