Three more people have been killed in the Ethiopian capital, Addis Ababa, in a third day of clashes between opposition supporters and the police.
Doctors said most of the dead had been shot in the chest
Hospitals say a further 11 people were wounded. They say more than 40 people have died in violence this week.
The city's streets are littered with debris, and many businesses are closed.
The riots were part of protests against the general election in May, which the governing party won. The opposition says voting and counting were rigged.
Thursday's victims were shot in a wealthy neighbourhood where many of the city's expatriate community live.
Doctors told reporters of more than 150 people coming to hospital wounded in clashes between stone-throwing opposition supporters and police. Many of those killed had been shot.
The main opposition party, the Coalition for Unity and Democracy, resumed protests this week after its members refused to attend parliamentary sessions.
The ensuing disturbances were the worst seen since protests immediately after the elections, when almost 40 died.
There were reports of hundreds of arrests late on Wednesday and on Thursday morning. The capital, a city of 3m, is an opposition stronghold.
The United Kingdom Foreign Office has warned people not to travel to Ethiopia unless essential. Lord Triesman, minister for Africa, said he is alarmed by the outbreaks of violence and he urged maximum restraint.
The BBC's Mohammed Adow in Addis Ababa said armored personnel carriers carrying special troops rumbled down streets littered with burning tyres and broken glass.
In some parts of the city there was relative calm but taxis were off the streets.
He says Thursday's protests took place as thousands of Muslims gathered in the city's main square to hold prayers to celebrate the end of the holy month of Ramadhan.
Security officers have arrested all 15 members of the CUD's Central Committee and about 1,000 supporters according to a lawyer for the party.
The opposition say Meles rigged elections in May
Information Minister Berhan Hailu said the government was "sorry and sad", but blamed the violence on the CUD.
Mr Meles's EPRDF won a majority in polls but the opposition gained many seats.
The Ethiopian government has dismissed an assessment by European Union monitors that the elections failed to meet international standards.