TEHRAN, Iran — Iran's President Mahmoud Ahmadinejad has called the detention of his top press adviser "regretful".
The official Irna news agency quoted Ahmadinejad as saying that he would look into the arrest of Ali Akbar Javanfekr.
Authorities on Wednesday took Javanfekr into custody to begin serving a six-month sentence for publishing material deemed insulting to the country's Supreme Leader Ayatollah Ali Khamenei.
It is the first reaction by Ahmadinejad to the case.
The arrest is seen part of ongoing feud between Ahmadinejad and his conservative rivals ahead of June presidential elections in which Ahmadinejad is not allowed to run, under the law.