<p>Hyderabad: Three workers died after they inhaled a toxic gas while cleaning a sewerage manhole here on Friday, police said.</p>.<p>A 40-year-old worker who first entered the manhole at Kulsumpura in the city collapsed and two others who tried to rescue him also fell unconscious, they said.</p>.<p>One of the three workers was pulled out and rushed to a hospital, where he died while undergoing treatment.</p>.<p>The bodies of two others were retrieved by the personnel of the Disaster Response Force (DRF) of Greater Hyderabad Municipal Corporation (GHMC).</p>.<p>The trio was hired by a private agency to clean the sewerage, they said.</p>
<p>Hyderabad: Three workers died after they inhaled a toxic gas while cleaning a sewerage manhole here on Friday, police said.</p>.<p>A 40-year-old worker who first entered the manhole at Kulsumpura in the city collapsed and two others who tried to rescue him also fell unconscious, they said.</p>.<p>One of the three workers was pulled out and rushed to a hospital, where he died while undergoing treatment.</p>.<p>The bodies of two others were retrieved by the personnel of the Disaster Response Force (DRF) of Greater Hyderabad Municipal Corporation (GHMC).</p>.<p>The trio was hired by a private agency to clean the sewerage, they said.</p>