Foreign Ministry spokesman Bahram Qasemi

Iran's Foreign Ministry confirmed on Sunday that a Saudi Arabian delegation will visit Tehran after Saudi Arabia severed ties with Iran last year, Press TV reported.
"The Saudi delegation simply comes to visit diplomatic buildings because the buildings have been empty after the two countries broke off relations. At the same time, we will visit our buildings in Saudi Arabia," Foreign Ministry spokesman Bahram Qasemi said.
Qasemi confirmed that the visas for the Saudis have been issued long before, but for "reasons that are related to them, they have not come yet, and their travel has likely been postponed until after (annual Muslim) Hajj ceremonies."
He added that the date for the Iranian delegation's visit has not been set yet.
Saudi Arabia severed its diplomatic relations with Iran in January 2016, following demonstrations held in front of the Saudi embassy in Tehran and its consulate in the northeastern city of Mashhad by angry protesters who set the diplomatic missions ablaze for the execution of top Shiite cleric Nimr al-Nimr by Saudi Arabia.

source: Xinhua