Shamkhani, who is an Arab from Khuzestan, made the remarks in a post on his Twitter account, adding that Khuzestanis have every right to express their protest.
For more than a week, people in Khuzestan have been protesting a shortage of water which has resulted in the deaths of their buffalos.
People in other provinces like Lorestan (Aligoodarz) and East Azarbaijan (Tabriz) have held rallies in solidarity with Khuzestan.