A courtroom sketch of five defendants in U.S. district court in Manhattan, Nov. 20, 2013, accused of conspiring to smuggle North Korean meth into the U.S. Jane Rosenburg/Reuters

Move over, Walter White. Five men have been extradited to the U.S. from Thailand for their alleged participation in a drug-trafficking ring involving the import of crystal meth produced in North Korea, a militarized nation that is one of the most reclusive in the world.

The men were arrested in September after they allegedly promised North Korean–made methamphetamines to undercover agents of the U.S. Drug Enforcement Administration (DEA) to be exported to the United States.

Two of the men, who officials say were members of a Hong Kong–based criminal organization, allegedly sold more than 66 pounds of meth produced in North Korea in 2012.

That crystal meth was later seized by law enforcement, tested and found to be more than 99 percent pure — purer than the infamously high-quality meth cooked by Walter White, the fictional teacher-turned-drug-lord in the popular TV series "Breaking Bad."

The other three men — two from Great Britain and one from Thailand — allegedly agreed to transfer the meth from Thailand and store it in the Philippines.

"This investigation continued to highlight the emergence of North Korea as a significant source of methamphetamine in the global drug trade," DEA Administrator Michele Leonhart said in a statement.

The men all pleaded not guilty to conspiracy charges Wednesday, and a judge ordered them to be held without bail until their next court date, on Dec. 5, according to The Associated Press.

According to court documents, one of the defendants, Ye Tiong Tan Lim, also known as “Giorgio,” had bragged to undercover DEA agents that out of eight groups that had smuggled and dealt crystal meth from North Korea, his was the only one still capable of getting meth produced there.

He claimed that the North Korean government had burned all the meth labs to allay suspicions from the U.S. government. "Only our labs are not closed," he said.

Lim also said the group had stockpiled 1 ton of North Korean meth in the Philippines.