While imprisoned in the Maze, Kelly again went on protest and made a number of escape attempts in 1977, 1982 and 1983. On 25 September 1983, Kelly was involved in the Maze Prison escape, the largest break-out of prisoners in Europe since World War II and in UK prison history. Kelly, along with 37 other republican prisoners, armed with six hand-guns, hijacked a prison meals lorry and smashed their way out of the Maze past 40 prison officers and 28 alarm systems. During the escape Kelly shot a prison officer, who attempted to foil the escape, in the head with a gun that had been smuggled into the jail. The officer survived.