The documents record a methane leak in January and show that safety measures and equipment to monitor the gas were subsequently recommended and sought. It is not clear from the documents whether all these recommendations had been fully implemented before work resumed | India News

Just ten days before the tragedy, the company issued a tender for services that included management of methane gas in the tunnel.

The documents record a methane leak in January and show that safety measures and equipment to monitor the gas were subsequently recommended and sought. It is not clear from the…