A senior vigilance officer at Hindustan Copper Limited died after a lift collapsed at the Kolihan mine in Rajasthan's Neem Ka thana district, said officials, adding that 14 trapped people have been rescued. Fifteen employees, including vigilance officers and workers of Hindustan Copper Ltd, were trapped at 1,875 ft in a mine at Kolihan near Khetri in the district after the lift broke down.