NEW DELHI, AUG 29: Twenty-eight prisoners and five jail officials have been injured in high security jail number five of Central Tihar Jail here in a clash between two groups of prisoners. The incident occurred on August 27 when the two groups of under-trial prisoners started fighting over a trivial issue, police said.Five jail officials sustained minor injuries when they went to intervene and prevent the inmates from fighting. A case of rioting has been registered against the prisoners.