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Massive Landslide Hits Sikkim's Mangan District

Officials said no casualties were reported and downstream areas remain under watch as water accumulates and muddy flows continue at outposts.

  • On Sunday, a massive landslide hit Mangan district in Sikkim, partially blocking the flow of the Teesta and Chyakoong rivers at their confluence, according to the State Disaster Management Authority .
  • A significant section of the hillside collapsed in the Naga Forest area near the Theng Tunnel during the night of September 5 and 6, providing geographic context for the blockage.
  • Ground assessments by Chungthang police and personnel at the Theng Check Post show river levels at Sankalang and Phidang remain normal, though water is currently muddy.
  • The SSDMA has alerted vulnerable areas in the lower belt as a precaution, urging residents to avoid riverbanks and rely only on official information regarding the situation.
  • Local authorities, including the District Disaster Management Authority and the Police Control Room, are maintaining continuous surveillance of the site to monitor for significant changes.
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A landslide has partially blocked the flow of the Teesta and Chakong rivers in North Sikkim's Mangan district. The landslide occurred in the Naga Forest area, prompting authorities to issue a cautionary alert for those living in low-lying areas. No casualties have been reported yet, but property damage is being assessed.

The HinduThe Hindu
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Massive landslide hits Sikkim's Mangan district

A massive landslide in Sikkim's Mangan district partially blocks two rivers, with no reported casualties or injuries.

·Chennai, India
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The News Mill broke the news on Sunday, September 6, 2026.
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