TEHRAN, April 11 (Xinhua) -- Iran's Foreign Ministry spokesperson Esmaeil Baghaei said Tehran is in constant contact with Beirut to ensure the ceasefire commitments in Lebanon are implemented, semi-official Fars news agency reported Saturday.

Speaking from Pakistan's Islamabad, where U.S.-Iran formal negotiations to end the hostilities in the Middle East just kicked off, Baghaei said the Iranian delegation has held talks with Pakistan, and has conveyed clearly its positions and demands, Fars reported.

Baghaei added that ceasefire violations were observed on Saturday, Fars reported.