Fourteen people were killed and over 200 injured when a 5.9-magnitude earthquake hit north-western Tanzania, a local official said on Sunday.
Officials had previously placed the death toll at 10.
Widespread damage was reported following Saturday's quake, which hit the Kagera region on the western shore of Lake Victoria and also rocked the neighbouring regions of Mwanza, Mara and Simiyu.
"According to the reports available to me, there are more than 200 injured," said Deodatus Kinawilo, district commissioner for Bukoba.
The quake had its epicentre in Tanzania, according to sources at a volcanic observatory in the Congolese city of Goma, where the quake was also felt.
Goma residents said it occurred at about 1230 GMT.
Emelensiana Benjamin from Bukoba town said houses there had cracked so badly residents were afraid to enter them.
"We fear that they might crumble any time," she said.
Tanzanian Prime Minister Kassim Majaliwa travelled to Bukoba on Sunday to assess the damage.
The affected region is located on the East African Rift, where the tectonic plate that makes up Africa is gradually dividing into two.