Kazakh border guards have detained six Russian nationals for border violations, the Central Asian state's National Security Committee said Tuesday, RIA Novosti reported.

"A Kazakh border guard detail detained six nationals of the Russian Federation who were traveling by car from Kazakhstan to Russia on November 9," the committee said in a statement.

"They tried to illegally cross the border," the statement said, adding that they had also been trying to smuggle "200 kilograms of fish."

An investigation is underway.