Azerbaijani President Ilham Aliyev has met in Tehran with his Iranian counterpart, Hassan Rohani, to discuss strengthening cooperation between their two countries and the status of the Caspian Sea.
Four agreements were signed at the April 9 meeting, the most significant concerning construction of hydropower plants and protection of the environment.
Representatives of the two countries signed a deal to construct and operate the Ordubad hydropower plant in Azerbaijan and the Marazad plant across the border in Iran.
Other agreements covered cooperation in youth affairs and sports, and the elimination of consequences from a disaster.
Rohani said he and Aliyev discussed the status of the Caspian Sea but he did not elaborate.
Iranian media reported Rohani also offered Iran's services in mediating a deal between Azerbaijan and Armenia over the disputed Nagorno-Karabakh territory both countries claim.
Based on reporting by AP, Trend.az, and ISNA