China accused of restricting rare earth metal exports
10 July 2012 Last updated at 08:21 BST
The European Union, United States and Japan bring a complaint to the World Trade Organisation on Tuesday.
They allege China is restricting exports of so-called rare earth metals and that distorts the global economy.
Rare earth metals are used to make high-tech devices and the restrictions make it more expensive to make such goods outside China.
Philip Hampsheir reports.