The European Commission said on Thursday it has asked the World Trade Organisation to set up a panel to look into what Brussels sees as the United States' refusal to stop subsidies to plane maker Boeing in the world's largest trade dispute.

"It is now clear for the European Union that the United States has not only failed to properly implement the decision of the WTO but it has even provided new subsidies to Boeing," the Commission said in a statement.

The United States said last month it had complied with a ruling ordering it to withdraw unfair subsidies to Boeing.

(Reporting by Robin Emmott; editing by John O'Donnell)