“I am concerned that when these countries engage in provocations of one kind or another over these various islands, that it raises the possibility that a misjudgment on one side or the other could result in violence, and could result in conflict,” Panetta said. He also warned that Beijing and Tokyo should put an end to provocations or risk a “potentially expanding” conflict. Following the diplomatic meeting with Panetta, Japanese Foreign Minister Koichiro Gemba said that Washington had agreed that the Senkaku islands, claimed by both Japan and China, are covered by a US-Japan security treaty. In the 1960 treaty, the US committed to aid the Japanese in the event of an attack on the nation’s territory. “I did not bring up the topic today, but it is mutually understood between Japan and the United States that [the islands] are covered by the treaty,” Gemba said after the meeting on Monday. Washington previously claimed that the US would not take sides in the territorial dispute over the archipelago in the East China Sea. The US also signed an agreement with Japan on Monday to build a second missile defense radar installation on Japanese territory, aimed at countering North Korea. China may view the move as a provocation. The Senkaku islands – known as Diaoyu to the Chinese – are uninhabited, but are believed to contain rich mineral deposits and are located on important shipping lanes. Violent protests rocked China after Japan announced last week that it had purchased three of the islands from a private owner. In the latest bout of demonstrations, anti-Japanese activists attacked Panasonic factories in the eastern city of Quingdao. Protesters burned Japanese flags and targeted Japanese-made cars. In response to the wave of unrest, Panasonic temporarily ceased operations in China. In addition, Canon announced that it would suspend operations for employees’ safety. Toyota Motor Corp also said that it was affected by the anti-Japanese unrest, citing a suspected arson attack on one of its factories in the eastern Shandong province.