Kind of reminds me of too many episodes of Hogan's Heros

Estonian prison officials foiled an escape attempt by inmates who had started digging a tunnel at the country’s largest penitentiary in Murru, 30 kilometers southwest of Tallinn.

Officials discovered the plot when they came across two dirt-covered prisoners in a little-used part of a cell block. The attempt was doomed to fail as there were dozens of meters between the cell block and the nearest boundary, a spokesman said.