Herald Sun | Group of 17 Port Augusta prison inmates surrender after holing up in gymnasium for seven hours Herald Sun PHOTOS released today have revealed the extent of the damage after 17 inmates holed themselves up inside Port Augusta prison for seven hours on Friday night. The prisoners barricaded themselves inside a gymnasium for more than seven hours before ... Police investigating seven hour siege at South Australian prison Port Augusta prisoner stand-off under police investigation Inmates surrender after demanding cigarettes, dinner in prison siege |