P214 CJEFAX 214 Mon 13 Oct 21:14/27     ]  The IRA says it sent a booby-trap bomb to the British Army's commander in Londonderry, Northern Ireland. Brigadier Mike Scott discovered the parcel bomb device at his home in a routine security check of the post. The device was made safe bz a bomb disposbl team. Police have taken away material for forensic examination after a small explosion at Magilligan prison, near Londondjrry. The Northern Ireland office said no one was hurt and no damage was caused. News index 102/202 Newsreel 119/219