BEIJING — Thousands of Chinese besieged the Japanese embassy in Beijing on Saturday, hurling rocks, eggs and bottles with protests reported in other major cities in China amid growing tension between Asia's two biggest economies over a group of disputed islands. Paramilitary police with shields and batons barricaded the embassy, holding back and occasionally fighting with slogan-chanting, flag-waving protesters who at times appeared to be trying to storm the building. “Return our islands! Japanese devils get out!” some shouted. One of them held up a sign reading: “For the respect of the motherland, we must go to war with Japan.” Protester Liu Gang, a migrant worker from the southern region of Guangxi, said: “We hate Japan. We've always hated Japan. Japan invaded China and killed a lot of Chinese. We will never forget.” As tension escalated, and reports emerged of other protests around China, Japan said its foreign minister had cut short a visit to Australia and flown back to Tokyo. The long-standing territorial dispute escalated dramatically on Friday when China sent six surveillance ships to a group of uninhabited islets in the East China Sea, raising tension between the two countries to its highest level since 2010. China was responding to Japan's decision on Tuesday to buy the islands, which Tokyo calls the Senkaku and Beijing calls the Diaoyu, from a private Japanese owner despite Chinese warnings against doing so. Sino-Japanese ties have long been plagued by China's bitter memories of Japan's military aggression in the 1930s and 1940s and present rivalry over resources and regional clout. Relations between the two countries, whose business and trade ties have blossomed in recent years, chilled in 2010, after Japan arrested a Chinese trawler captain whose boat collided with Japanese Coast Guard vessels near the islands. In Shanghai, streets around the Japanese consulate, in the western part of town, were cordoned off on Saturday. Hundreds of police let small groups of people in at a time to protest. Japanese media said big anti-Japan protests were also being held in the Chinese cities of Xian, Changsha, Nanjing and Suzhou, with some reports of violence as people attacked Japanese restaurants and businesses. Japan's Kyodo news agency said that the demonstrations were the biggest in China since the two countries normalized diplomatic relations in 1972. Pictures on China's popular Twitter-like Sina Weibo showed hundreds of protesters marching down a street in the southwestern city of Kunming with banners and Chinese flags. Users also reported protests in other, smaller cities. The government appeared to be making little attempt to censor posts and pictures about the demonstrations. There have been sporadic protests around China throughout the week, although those in Beijing had been small and largely peaceful. The latest dispute flared up last month after Japan detained a group of Chinese activists who had landed on the islands. Diplomats say Tokyo and Beijing want to keep the row from escalating, but managing the situation can be difficult given that China is undergoing a leadership change, an election is looming in Japan and mutual mistrust runs deep. — Reuters