Rescuers in the US state of Utah are close to completing a hole that could get air to six miners trapped deep underground since Monday. The six are thought to be in a chamber more than 450 meters below ground level, but it is still unknown whether they are still alive. Two drills are inching towards the miners’ supposed location to provide them with air and water. The chairman of the mining company said: “Alot of (the mine’s) ventilation, not all of it but some of it, will get to them and keep them alive. All they need is air until we can get to them.” So far no contact has been possible with the trapped miners. Meanwhile locals in the town of Huntingdon continue candlelit vigils. Company officials say an earthquake caused the mine to cave in on Monday, but there has been some speculation that the miners were using dangerous techniques at the time.