Lebanese Minister of Energy and Water Jibran Bassil is in Tehran for meetings with his Iranian counterpart Majid Namjou and other officials.
Bassil left Beirut for Tehran late on Friday, a Press TV correspondent in Lebanon reported.
After his arrival in the Iranian capital, the Lebanese energy and water minister said boosting Beirut-Tehran interactions in the oil and water sectors is one of the main aims of his visit.
He said he would also be holding discussions on Iran's proposal to help the Mediterranean country find a permanent solution to its electricity problems.
The Iranian ambassador to Lebanon, Ghazanfar Roknabadi, said Tehran and Beirut are strengthening bilateral relations -- especially in the oil and water sectors.
Roknabadi had said earlier that Iranian President Mahmoud Ahmadinejad will encourage the Lebanese trying to strengthen national unity during his upcoming visit to Lebanon.
Ahmadinejad plans to make his first official visit to Lebanon in October.
The Iranian president is expected to meet with Lebanese President Michel Sleiman, Prime Minister Saad Hariri, and Parliament Speaker Nabih Berri as well as leaders of the Hezbollah movement.