TEHRAN, Aug. 8 (Xinhua) -- Iranian President Hassan Rouhani will visit the Kazakh city of Aktau on Saturday to attend a summit of the five Caspian Sea coastal countries, Tasnim news agency reported Wednesday.

During his two-day visit to Kazakhstan, Rouhani will sign "important and strategic documents" on cooperation among the five Caspian states, said Parviz Esmaili, Rouhani's deputy chief of staff for communications and information.

Rouhani will also hold meetings with his Kazakh counterpart Nursultan Nazarbayev and a number of other dignitaries.

The first meeting of the Caspian states' leaders was held in 2002 in Ashgabat, capital of Turkmenistan.

The Caspian Sea is the largest enclosed water body on Earth by area, either classed as the world's largest lake or a full-fledged sea.