The activists, who did not want to be identified, claimed officials were “desperate” seeking public expressions of grief following the leader’s death in a helicopter crash on Sunday.
It comes after Iran’s Supreme Leader, Ayatollah Ali Khamenei, decreed five days of national mourning, with funerals beginning yesterday.
Iranian media reported that the collision near the country’s border with Azerbaijan killed eight people, including Mr Raisi’s foreign minister and three helicopter crew members.
On Tuesday, the late president’s casket was flown to Tabriz, the nearest major city to the crash site, and state TV showed mourning.