<p>Ambikapur: Three workers were killed and one sustained injuries after a hopper filled with coal collapsed on them at an alumina refinery in Chhattisgarh's Surguja district on Sunday, police said.</p>.<p>Rescue efforts are underway to trace one more worker who is missing, they said.</p>.<p>The incident occurred around 11 am at Maa Kudargarhi Alumina Refinery in Silsila village under the Raghunathpur police chowkie, an official said.</p>.<p>As per preliminary information, a steel tower-mounted hopper filled with coal collapsed and fell on men working below it, he said.</p>.Raipur BJP MP Brijmohan Agrawal seeks govt intervention for rollback of hike in cement prices.<p>The police were alerted, and a team rushed to the spot and launched a rescue operation, he said.</p>.<p>"Bodies of three workers have been retrieved from the site so far, and one worker was found in a critical condition and is hospitalised," the official said.</p>.<p>Another worker is said to be missing, and efforts are underway to trace him, he added. </p>
<p>Ambikapur: Three workers were killed and one sustained injuries after a hopper filled with coal collapsed on them at an alumina refinery in Chhattisgarh's Surguja district on Sunday, police said.</p>.<p>Rescue efforts are underway to trace one more worker who is missing, they said.</p>.<p>The incident occurred around 11 am at Maa Kudargarhi Alumina Refinery in Silsila village under the Raghunathpur police chowkie, an official said.</p>.<p>As per preliminary information, a steel tower-mounted hopper filled with coal collapsed and fell on men working below it, he said.</p>.Raipur BJP MP Brijmohan Agrawal seeks govt intervention for rollback of hike in cement prices.<p>The police were alerted, and a team rushed to the spot and launched a rescue operation, he said.</p>.<p>"Bodies of three workers have been retrieved from the site so far, and one worker was found in a critical condition and is hospitalised," the official said.</p>.<p>Another worker is said to be missing, and efforts are underway to trace him, he added. </p>