The Obama administration on Wednesday imposed fresh sanctions on three key transnational criminal organizations (TCOs) operating in Asia and Europe.

The Department of Treasury targeted this time four members of the Camorra, one of Europe's largest criminal organizations; the Inagawa-kai, the third largest clan within the Japanese Yakuza criminal network; and an individual providing support to a key member of the Brothers' Circle, a large multi-ethnic Eurasian criminal network.

The move freezes all of their assets under U.S. jurisdiction and bars American citizens from doing business with them.

"The individuals designated today are key members of criminal organizations who engage in serious crimes around the world," said David Cohen, under secretary of Treasury for terrorism and financial intelligence.

"Treasury will continue to target additional members and supporters of these groups, as well as other significant TCOs, as we systematically expose their criminal operations and protect the U.S. financial system from their illicit activity," he said in a statement.

President Barack Obama identified Camorra, Yakuza and Brother's Circle as TCOs in July 2011 along with Mexico's Los Zetas.