The attack that took place late on Sunday targeted Shah Cheragh shrine located in downtown Shiraz.
Early reports indicated that the attacker had opened fire at people after being confronted by security guards at the gates of the shrine.
Fars Deputy Governor Esmail Ghezel Sofla described the attacker as a Takfiri element and said the person had been arrested and is being interrogated by judicial authorities.
Shah Cheragh was subject of a major terrorist attack in October last year that led to deaths of 13 people.
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