Two Chinese companies were fined millions of yuan for violating regulations on missile export control, the Ministry of Commerce said Tuesday in Beijing.

The two companies are in the eastern provinces of Jiangsu and Shandong, the ministry said, but did not give the concrete amounts of the fines and the names of the companies.

A ministry official said the Chinese government always stands against the proliferation of weapons of mass destruction and terrorism, and has already issued a series of regulations on export control concerning nuclear, biological and chemical items, missiles and other sensitive items.

The official warned related companies to abide by laws and regulations, which will "not only benefits national security and public interest, but also the companies themselves."