Police in Kenya have confirmed that three people died in clashes with riot police in the south-western city of Kisumu on Saturday.
Denis Otieno,20, says he was shot by police in Kisumu
But the chairman of a local hospital told the BBC that 10 bodies were brought to the hospital's mortuary.
The unrest appears to be linked to a rally called on Saturday in support of new constitutional proposals.
A court in the African country has indicted more than 40 people in connection with the riots.
They were charged with several offences, including incitement to violence.
Kisumu is a centre of opposition to the proposals, which critics say will leave too much power with the president.
Internal Security Minister John Michuki said on Sunday the government would deal ruthlessly with people causing chaos.
"(They) should know that there is an elected government firmly in place whose cardinal duty is to protect its people," he said during a pro-constitution rally in the capital, Nairobi.
MP Maina Kamanda said Roads Minister Raila Odinga should be arrested for questioning over the Kisumu violence, Kenya's Daily Nation newspaper reports.
'No' supporters blocked the main Kisumu-Nairobi road
Mr Odinga is part of the ruling coalition but has joined with the main opposition party, Kanu, to campaign against the proposals, using the symbol of an orange.
President Mwai Kibaki's government is leading the "Yes" campaign under the symbol of a banana.
If the new constitution is approved on 21 November, it would be the first major overhaul of Kenya's constitution since independence from Britain in 1963.
Critics of the draft say it fails to establish a strong prime minister's post, which they say would prevent the president abusing his powers.
Instead, the premier is appointed and can be dismissed by the president.