China says food inspectors in a northern province have found dangerous substances in soy sauce and coffee imported from Japan.

The Guangdong Inspections and Quarantine Bureau said on its Web site Tuesday that its inspectors in the city of Tianjin discovered that Japanese soy sauce contained arsenic levels five times higher than permitted.

The product safety agency also said that imported Japanese coffee had twice the allowable level of copper.

Japanese officials had no immediate reaction to Tuesday's charges.

The two Asian giants have traded accusations of unsafe food since the tainted Chinese milk scandal broke out in September.

Milk tainted with the industrial substance melamine has been blamed for killing four children and sickening at least 53,000 others in China.

Since last year, Japan has blamed Chinese-made dumplings and frozen beans for sickening about a dozen of its citizens.

Some information for this report was provided by AFP.