Tasnim Iranian President Hassan Rouhani sent a written message to Oman's Sultan Qaboos bin Said Al Said.
Irans Ambassador to Muscat Mohammad Reza Noori delivered the message to Sayyid Khalid bin Hilal bin Saud al Busaidi, Minister of the Diwan of Royal Court of Oman, Muscat Daily reported on Monday.
The Iranian envoy and the Omani minister also held talks on the bilateral relations between the two countries in the meeting.
Iran and Oman have developed strong political relations in recent years, with their top officials making regular reciprocal visits.
Sultan Qaboos played an important role in facilitating the early stages of the nuclear talks between Iran and world powers that led to the Joint Comprehensive Plan of Action (JCPOA) in 2015.