A row over transboundary waters is simmering between Turkey and Iran, adding to recent tensions over the formation of a new government in Iraq and the control of the Iraqi region of Sinjar. Irked by Turkey’s construction of dams on the Aras and Tigris rivers, Tehran has come to publicly accuse Ankara, cranking up a dispute that has been largely confined to diplomatic channels thus far.

Speaking in parliament May 10, Iranian Foreign Minister Hossein Amir-Abdollahian slammed Turkey’s dam projects as “unacceptable” moves that threaten to reduce waterflows and inflict environmental damage to both Iran and Iraq. Tehran has to “pursue the case through dialogue and bilateral negotiations” since Turkey is not a signatory of the 1997 New York Convention on the non-navigational use of transboundary waters, which prevents Tehran from suing Ankara internationally, the minister said. “We should not allow countries such as Turkey to use the current lack of an international mechanism to change the environmental conditions either in Iran or Iraq,” he added.

Amir-Abdollahian said he had raised the issue with his Turkish counterpart at least three times in recent months — in two meetings in New York and Tehran and during a phone call — and proposed the formation of a joint commission to address the problem. A team of experts from Iran’s foreign and energy ministries held talks in Turkey earlier this year, and a Turkish delegation is expected to visit Iran soon, he said.

Iranian parliament speaker Mohammad Bagher Ghalibaf said Iran viewed the issue from a national security perspective.