Reza Pahlavi, the exiled son of the last shah of Iran, thanked President Donald Trump for his "support" of Iranian protesters.

Both the semi-official Fars news agency and human rights group, Hengaw, said two people had died during clashes between protesters and security forces in the city of Lordegan, in south-western Iran. Three more people were killed in Azna and another in Kouhdasht, Fars reported, all in the west of the country.

Trump threatens U.S. intervention if Iran violently suppresses ongoing protests, escalating tensions after last year's 12-day war between Israel and Iran.