Eight labourers were buried alive in Uttarakhand's Nainital on Saturday evening when part of a hillock fell over them as they were working at a construction site.
Nine labourers were trapped alive when part of the hillock fell in Ramgarh, Circle Officer Bhowali R S Hyanki said.
Eight of them were asphyxiated to death while one was rescued alive, he added.
Most of the workers belonged to Uttar Pradesh's Lakhimpur Khiri and Jharkhand.
The deceased labourers have been identified as Deshraj, Rahul and Ramesh Rana from Lahimpur Khiri besides Ajay Kumar, Mthun, Arun, Devindra and Ujjwal from Palamu in Jharkhand, he said.
The labourers were busy constructing a private residential building when they were buried alive.
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