More than 600 people were detained and about 100 hurt after a second night of riots in
Police fired tear gas and rubber bullets after new clashes with mainly ethnic Russian protesters erupted over the removal of a Soviet war memorial.
Russian officials said a man who died in Thursday night's clashes was a Russian national.
A Foreign Ministry statement said the Estonian authorities had at first denied that any Russian citizens were among the casualties.
The man, who was a resident of
The Estonian authorities have said he was stabbed by another demonstrator and that police had no involvement in his death.
There have been unconfirmed reports of a second death, in custody.
Russian President Vladimir Putin expressed "serious concern" about the events during a phone conversation with German Chancellor Angela Merkel, a Kremlin statement said.
Looting
The monument was removed on Friday and taken to a secret location.
Correspondents said a crowd of more than 1,000 demonstrators gathered on Friday evening where the monument used to stand.
Some of the protesters threw petrol bombs, while others waved Russian flags and chanted "Rossiya, Rossiya" (
Department stores and other shops in the city centre were looted.
There were also reports of rioting and looting in the towns of Johvi and Kohtla-Jarve, in a mainly ethnic Russian region east of
AFP said that in Johvi looters set fire to a statue of an Estonian general who fought the Russians during the country's 1918 war of independence.
By Saturday morning the situation in central
Squads of police were seen moving around the area where the memorial used to stand.
The BBC's Richard Galpin in
The decision to remove the Soviet monument has strained relations with
And for local ethnic Russians it is one insult too many, our correspondent says, after what they feel has been years of discrimination against them by the majority Estonian population.
Whereabouts unknown
More than a quarter of
However, half of them do not have Estonian citizenship.
But the Estonians believe much of the tension is being whipped up by forces outside the country, i.e.
During the years of Soviet occupation after World War II, tens of thousands of Estonians were killed. And they say their country was effectively colonized with many Russians being brought in as workers and military personnel.
The memorial, a bronze statue of a Soviet soldier, was erected in 1947. The remains of Soviet soldiers are thought to be buried nearby.
Photo caption
Riot police surround the Bronze Soldier in