Arizona has begun stacking shipping containers to close a 1,000-foot gap in the U.S.-Mexico border wall near Yuma after Gov. Doug Ducey (R) issued an executive order Friday directing the state to immediately fill remaining gaps.

Why it matters: Ducey says the Biden administration has repeatedly ignored the crisis caused by the surge in border crossings and that Arizona can no longer wait for federal action. The move, which comes as the Biden administration rolls back the Remain in Mexico policy, was not authorized by the federal government even though the wall stands on federal land, AP reports.

Details: The state is double-stacking 60 shipping containers, welding them shut and adding four feet of razor wire to reinforce the physical barrier, according to a press release from Ducey's office.

What they're saying: "Arizona has had enough. We can’t wait any longer," Ducey said in a statement that pointed to the presence of cartels and drug smuggling. "The Biden administration’s lack of urgency on border security is a dereliction of duty."

The big picture: The Biden administration actually authorized the completion of the U.S.-Mexico wall in the southern Arizona region in July, AP notes. State officials say federal officials haven't moved fast enough, however.