Can Iranian nationals extend a 60-day tourist visa in Thailand by 30 days?

Hey, does anyone know if Iranian nationals who have a 60-day tourist visa can (like most other nationalities) extend it by another 30 days at the immigration office? Having trouble finding this info. For a friend. Since they have to jump through more hoops than the rest of us to get visas, wondering if the 60 days is in fact strict 60 days only for them. Thanks!