New Delhi, Aug. 9 -- Two inmates at Delhi's Tihar Jail died on Friday morning after allegedly slipping and drowning in a stormwater drain inside the prison premises, officials said. Both were serving murder sentences. The deceased, Amit Kumar and Vinay Kumar, were on gardening duty when the incident occurred around 8.30am. A guard on a watchtower reportedly saw them fall into the drain. "We are verifying whether they were told to clean it or acted on their own. It is also possible one slipped and the other tried to help," said a senior jail official, adding that a tilted manhole cover may have caused the mishap. The drain, about 15 feet deep, contained water. "They were pulled out before falling into the pit but had already drowned," the ja...