Iran's semi-official Fars news agency says a private plane carrying a Saudi national and an Iranian pilot has gone missing in northern Iran.

The Tuesday report said the pilot lost communication shortly after departing Ramsar airport on Monday at around noon as visibility dropped to about 800 meters (875 yards) because of fog.

It said Iran's Red Crescent was searching for the two men in a nearby wooded area.

Fars said the Saudi was honeymooning in the country with his Iranian wife, who was not on the plane.