Four ISIS terror suspects were arrested in central Kayseri province Wednesday, according to a security source.

Axar.az reports citing AA that one of those detained allegedly posted a video that showed him killing his own brother on the orders of the terrorist organization.

Abdulkhaleq Abdulqader Ali shot his brother in the head and posted a video of it on social media.

Ali was arrested along with three others linked to him.

His brother was reportedly opposed to the terrorist organization, the source, who spoke anonymously due to restrictions on talking to the media, said.

Police had launched an operation against the terrorists after receiving intelligence that members of the terror group had illegally crossed the border into Turkey.