Iranian President Hassan Rouhani will attend next month's meeting in China of the leaders of countries belonging to the Shanghai Cooperation Organization, the Chinese foreign ministry announced Monday.

Russian President Vladimir Putin is also planning to attend the summit to be held June 9-10 in the eastern Chinese city of Qingdao, the ministry said.

Iran is currently an observer member of the regional bloc, although it has long sought full membership.

Earlier this month, U.S. President Donald Trump announced he was withdrawing the United States from a 2015 nuclear agreement meant to prevent Iran from developing nuclear weapons. Trump also vowed to impose "the highest level of economic sanction" against the Iranian regime, foreshadowing U.S. action against foreign companies that continue to do business in and with Iran.

Under the 2015 deal struck between Iran and six major powers -- Britain, China, France, Germany, Russia and the United States under Trump's predecessor Barack Obama -- Tehran agreed to curb its nuclear activities in return for the lifting of crippling economic sanctions.

The Shanghai Cooperation Organization was founded in 2001 in Shanghai by the leaders of China, Russia, Kazakhstan, Kyrgyzstan, Tajikistan and Uzbekistan. India and Pakistan joined the SCO as full members last year.