If the evidence collected for the case indicates that a person has committed an action forbidden by Criminal law and if he is elsewhere or the whereabouts of this person is unknown, the body of the criminal persecution has the right to issue an order for his detainment.

Detainment based on these grounds shall last no longer than 72 hours after a person’s detainment. A person detained on the grounds provided on these grounds shall be informed of the charges pressed against him within 72 hours after his detainment. Within the mentioned deadline, charges may be not presented to the suspect, if after the moment of detention, within 72 hours, he is released from detention, because a securing measure was not selected or the securing measure is not related to detention.
The body of the criminal persecution which has issued an order for detainment shall be immediately informed by the inquiry body, investigator or prosecutor about the execution of the order.

Source: Iravaban.net