A 3D printed gun, called the "Liberator", is seen in a factory in Austin, Texas on August 1, 2018. (Xinhua/AFP)

LOS ANGELES, Aug. 10 (Xinhua) -- California Attorney General Xavier Becerra Friday joined a coalition of 20 U.S. Attorneys General in filing a motion to continue blocking the publication of downloadable blueprints for 3D-printed guns.

On June 29, the U.S. government abandoned two favorable federal court rulings authorizing the government to block the publication and reached a settlement with a Texas-based company that distributes blueprints for 3D-printed guns, which are called "ghost guns" because they are untraceable and could be manufactured on a 3D printer.

This agreement became public in late July. Becerra then joined a bipartisan coalition of 20 attorneys general led by Washington State calling on the federal government to change course and block the company from posting blueprints online.

The coalition of 20 states, which filed a suit on Aug. 2 as plaintiffs, issued a letter Friday expressing grave concerns about the U.S. Department of State's failure to enforce federal law to keep untraceable firearms out of the hands of terrorists, criminals, and others seeking to do harm.

These attorney generals from 20 states said in the letter that the company had posted several downloadable 3D gun files on its website, "including files that had been previously identified as subject to the controls of the International Traffic in Arms Regulations." This posed a public safety risk, however nothing has been done about it.

"This is a manufactured crisis," the letter said. "Some of these weapons may even be undetectable by x-ray machines and magnetometers in places like airports, courthouses, and other government buildings; they are also untraceable by law enforcement."

"The federal government's actions have made it easier for violent criminals, transnational gangs, and other bad actors to develop, acquire, and conceal firearms," it read, adding "we will continue to do what lies within our authority to confront this public safety risk head on."

Becerra's office also issued a press release Friday, saying Trump's giving the green light to distributing blueprints of 3D-printed guns "needlessly endangers our children, our loved ones and our men and women in law enforcement."

"We're asking the court to put the brakes on the Trump Administration's foolish and irrational action. President Trump must understand that his fingerprints will be all over these untraceable ghost guns if his inexplicable decision leads to the use of these dangerous weapons to commit crimes," Becerra said.