Tanzania's main opposition party says hundreds of people had been killed in protests over elections across the country this week, as the government said it was restoring order after "isolated incidents".

The United Nations said credible reports indicated at least 10 people were killed in protests in three cities, the first public estimate of any fatalities by an international body since Wednesday's vote.

The government has not released any estimates on casualties or responded to requests for comment. Reuters could not independently verify the figures.

Protesters have taken to the streets since Wednesday, angered by the exclusion of President Samia Suluhu Hassan's two biggest challengers from the race and what they described as widespread repression.

Witnesses have said police fired tea

See Full Page