Products containing traces of the industrial chemical melamine have been found in several Chinese restaurants in Hungary, the agriculture ministry's food safety officer, Miklos Suth, announced Monday.

The melamine content did not, however, reach dangerous levels, he added.

"Food products with melamine levels under the limits defined by food safety rules were found in a number of Chinese restaurants during the weekend," Suth told news radio Inforadio.

Melamine-contaminated Nestle products found on October 4 were still being examined, with results due to be published this week, he added.

"If the excess melamine content is confirmed, the entire stock will be destroyed," Suth said.

On Saturday, food safety experts found traces of melamine in a coffee product stored at a Nestle warehouse in Gyal, 25 kilometres (18 miles) southeast of Budapest.

"Nestle does not understand this result and is contesting the Hungarian authorities' conclusions in this regard," the company responded in a statement.

"Indeed, the same batch was retested in three different laboratories across the world and no melamine was detected.

"Nestle is consulting the authorities to seek clarification (and) is confident that none of its products is made from milk adulterated with melamine and that all its products are safe for consumption," the company added.

The multinational company had itself requested the examination of the 5.5-tonne stock of Coffee Mate, which had been imported from Thailand and had not yet been put on sale.