Rescue teams were picking through the rubble, looking for survivors and victims of the disaster which took place on Thursday in the town of Bukalasi in the Bududa district. An unknown number of people were still missing.
On Thursday she shared photos of the scene of what she described as a "massive landslide" on WhatsApp, including images of dismembered corpses caked in mud laid out by the river.
Some of the bodies had been partly covered with banana leaves by members of the public.
"The cause was the river bursting its banks upstream following heavy rain. When the water flowed down it brought a number of big stones with it that destroyed people's houses," said Nakasiita.
"Our search and rescue team is still on the ground evacuating people and removing them from the rubble." She said the Red Cross was sending relief supplies to the area, such as tarpaulins, blankets and water purification tablets.
Nathan Tumuhamye, director of an organisation that helps communities recover from natural disasters and conflict, told AFP that "four to five villages", and possibly a primary school had been affected.
"I have received the sad news of landslides wreaking havoc in Bududa District, killing a yet-to-(be)specified number of residents. The government has dispatched rescue teams to the affected areas," President Yoweri Museveni wrote on Twitter.
"The government will look at the other options available to stop further occurrences of these disasters." Bududa district in the foothills of Mount Elgon, which lies on the border between Uganda and Kenya, is a high risk area for landslides.
At least 100 people were reported killed in a landslide in Bududa in March 2010, and in 2012 landslides destroyed three villages. Government efforts to move vulnerable people to neighbouring districts have faced resistance from residents.
According to Tumuhamye some early warning systems for floods and landslides have been established in the area but without the capacity to respond to the warnings the systems have not helped residents escape disasters.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)