GENEVA (AFP) ― The World Trade Organization on Tuesday established a panel of experts to investigate a complaint by the United States over Chinese duties on auto imports.

In the dispute, one of many involving the world’s two biggest economies, the U.S. described China’s actions as having “profound procedural and substantive deficiencies,” a source close to the organization said.

The duties were also in breach of international trade rules, the U.S. delegation said.

China responded by saying that it regretted the U.S. request for the WTO dispute-settlement panel since Beijing had followed the organization’s guidelines and had hoped to solve the matter bilaterally.

The vehicles at issue were “dumped on the Chinese market and were subsidized by the U.S., causing injury to the domestic industry of China,” a Chinese statement said.

In December 2011, China announced it would impose anti-dumping duties on U.S.-imported vehicles with engines of 2.5 liters or larger, which it put at the time at around 50,000 vehicles a year.

The latest dispute dates back to July when the U.S. asked for WTO intervention after calling China’s actions “unjust.”

According to Washington, the Chinese duties affected more than 80 percent of U.S. auto exports to China.

U.S. Trade Representative Ron Kirk welcomed the WTO action.

“We will not stand idly by while China misuses trade remedy procedures and puts American jobs at risk,” Kirk said in a statement.

“As we have demonstrated in numerous cases, we are serious about holding China accountable to its WTO commitments and ensuring that there is a level playing field for American workers and businesses.”

In another ongoing dispute, the U.S. has also accused China of providing at least $1 billion in illegal subsidies to Chinese auto and auto parts exporters over 2009-2011, helping them beat U.S. manufacturers in the $350 billion U.S. market.