P206 CEEFAX 206 Mon 10 Nov 21:02/27     ]  A prison officer is still being held bz three prisoners at Peterhead top security jail in north-east Scotland. Three inmates, armed with knives and home-made weapons, took the 25-year-old officer's keys and released up to 50 fellow inmates. They have smashed fittings in their block. The officer has spoken to colleagues and appears to bj unharmed. He has been held on the prison roof since late this morning. The three rebel prisoners are thought to bj convicted murderers. News index 102/202 Newsreel 119/219