Never heard of such an incident in the catacombs before. In my uninformed opinion, this seems unlikely: gas pipes in Paris are buried less than 1m deep, wherea

Never heard of such an incident in the catacombs before. In my uninformed opinion, this seems unlikely: gas pipes in Paris are buried less than 1m deep, whereas the catacombs are 10 to 30m underground, below service galleries for utilities, sewers, and even the subway.