SHANGHAI -- Pakistani President Pervez Musharraf arrived here Tuesday evening for the upcoming summit of the Shanghai Cooperation Organization (SCO), slated for Thursday.

Pakistan, together with Mongolia, Iran, and India, are observer countries of the six-member regional organization, which comprises China, Kazakhstan, Kyrgyzstan, Russia, Tajikistan and Uzbekistan.

The presidents of Mongolia and Iran as well as the representative of the Indian government -- the country's petroleum and natural gas minister -- are scheduled to arrive in Shanghai on Wednesday.