Previously, police had surrounded the homes of these suspects, but could not apprehend them.
On September 05, the Army got the trio to surrender to the CID through lawyers.
They are now under interrogation.
The CID has information that they were the ones who had abducted the journalist, took him to Giritale Army camp and questioned him there.
In all, 10 Army intelligence members, both serving and retired and including three colonels, have been arrested over Prageeth’s forced disappearance.
In the course of the investigation, the CID has revealed that the Army intelligence had run a shadow LTTE group.