Canadian authorities did not tip off the POWs and detected signs of tunnel digging at Camp 30. All prisoners except one were arrested at the time of their escape attempt; the sole inmate who managed to escape travelled all the way to Pointe de Maisonette undetected, likely travelling onboard Canadian National Railway passenger trains to the Bathurst area. This POW was apprehended by military police and RCMP on the beach in front of the lighthouse on the night of the planned U-boat extraction.