Triggered by incessant rains for the last 36 hours, the flood had also affected more than three lakh people and over 20,000 people were camping in relief camps, they said today.
At least three districts in the Garo Hills region were declared worst-affected.
Three fresh deaths were reported from West Garo Hills district today. The district had earlier reported eight deaths.
In Shillong, a landslide in the Mawbah area on the outskirts of the city killed at least eight persons, including two women last night, East Khasi Hills Superintendent of Police M Kharkrang said.
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Seventeen persons were feared dead in North Garo Hills district's Kharkutta area while another seven were feared dead in neighbouring West Garo Hills district, the officials said.
In all 12,000 persons were shifted to 29 relief camps set up in South West Garo Hills district alone, District Deputy Commissioner Ram Singh said.
In North Garo Hills district and West Garo Hills district, several relief camps have been set up and officials are awaiting report for an exact number of persons lodged in those camps.
Chief Minister Mukul Sangma, who was stranded in Guwahati along with Speaker A T Mondal while on their way to the flood-affected region on Monday, reviewed the situation.
Sangma also took a chopper ride to the flood-affected areas in the region and ordered all affected districts to compile details of damages and losses at the earliest.