Marijuana may have been legalized in Colorado, however, its neighbor states of Nebraska and Oklahoma are not happy that weed is illegally crossing the border and reaching their respective states.

To address this issue, the attorneys general of the two states filed on Thursday with the U.S. Supreme Court a lawsuit seeking to strike down Colorado's landmark legislation. It excludes medical marijuana usage.

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The lawsuit says that Colorado's Amendment 64 created "a dangerous gap" in the country's drug control system because illegal drugs flowing into neighboring states undermine the existing weed prohibition in Nebraska and Oklahoma, cost state taxpayers and stress their criminal justice system, according to the lawsuit.

It also pointed out that the U.S. Constitution and federal anti-drug regulations disallows the development of a patchwork of state and local pro-drug policies and the grant of licensed distribution schemes nationwide goes against federal law.

Scott Pruitt, the AG of Oklahoma, said the state takes issue with Colorado's licensing scheme and commercialization that it has promoted at the expenses of its neighbors. He said they are affected by the trafficking of illegal products across the state borders, according to USA Today.

Colorado AG John Suthers said he was not surprised by the lawsuit but replied that their grievance is over the non-enforcement of federal laws and not the choice of Colorado voters to legalize cannabis use and sale.

Amendment 64 legalized the recreational sales of weed to adults in Colorado regardless of what state they live. But it bans buyers from bringing the cannabis outside the state, although border police confirm the increase in weed traffic across state boundaries.

Adult Colorado-ID holders could buy an ounce, while those with out-of-state IDs are sold only a quarter ounce of cannabis.

Business is thriving for the recreational weed sellers in Colorado who have earned so far more than $300 million since January, reports Denver Post.

Before the recreational sale was legalized on January 1, there was a 13,000 percent hike in marijuana confiscation in four state from 2005 to 2012, according to the Rocky Mountain High Intensity Drug Trafficking Area team, a federally funded project.

The lawsuit said that Colorado has not done much to keep the weed from being brought out of the state since buyers' background are not checked and their purchases not monitored.

"Nebraska taxpayers have to bear the cost," complained Nebraska AG Jon Bruning. "We can't afford to divert resources to deal with Colorado's problem."

TagsNebraska, Oklahoma, colorado, marijuana, legal pot, recreational marijuana, Lawsuit