Mottaki, who is on a visit to Astana, said that Kazakh President Nursultan Nazarbaev has already confirmed that he will attend.
The five Caspian nations -- Azerbaijan, Iran, Kazakhstan, Russia, and Turkmenistan -- have been negotiating a comprehensive sea border agreement since 1994, but the talks have so far brought no breakthrough.
Mottaki told reporters today that Iran will soon open a consulate in the Kazakh Caspian Sea port of Aktau and that Kazakhstan will in turn set up a consulate in the northern Iranian town of Gorgan.
The Iranian envoy has discussed joint economic projects with Kazakh officials, including the construction of a petrochemical plant in western Kazakhstan and an oil refinery in northern Iran.
The two countries are also considering building a grain terminal on Iran's Caspian Sea coast.
(Kazinform, Kazakhstan Today, IRNA, Fars)
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