Thousands of Chinese protesters staged a demonstration outside the Japanese Embassy in Beijing Saturday, angry over Japan's actions to claim complete control of a group of disputed islands in the East China Sea.
Protesters threw rocks and burned Japanese flags at the embassy, but were held back by riot police from breaking through a barricade.
There are also reports of protests in other Chinese cities.
The protests are the latest in a series of demonstrations since Tuesday when Japan said it had bought the islands from a private owner. China says such a purchase is not legal, and claims the territory as its own.
The dispute escalated Friday when China sent six surveillance ships to the waters around the uninhabited islands, known as Diaoyu in China and Senkaku in Japan.
Some information for this report was provided by AFP and Reuters.