In The Hague, in the Netherlands, some of the more than 400 people at a protest rally tried to storm the Chinese embassy on Sunday.
About 100 demonstrators managed to tear down part of the gate surrounding the mission and replace the Chinese flag with a Tibetan one before Dutch police stepped in and prevented them from entering the embassy compound.
Officers arrested two protesters, one of whom had managed to get inside the embassy building, said a police spokesman.
In Paris, a demonstration organised by France's Tibetan community drew some 500 people, carrying Tibetan flags and candles. Nearby, a large police presence protected the Chinese embassy.
In Prague, about 500 demonstrators, including former president Vaclav Havel and Green Party leader and Environment Minister Martin Bursika, gathered outside the Chinese embassy to protest.
In Rome some 250 protesters demonstrated in front of the Chinese embassy.
A rally in Brussels drew an estimated 300 people, brandishing signs saying 'Stop the killing in Tibet' and 'China respect human rights'. Speakers there urged a boycott of the Olympics Games to be held in August in the Chinese capital, with one telling the crowd: 'A country which does not respect human rights should not organise the Games.'
In Zurich on Saturday, Swiss police had used tear gas and rubber bullets on between 20 and 50 protesters who threw stones at the Chinese consulate, although hundreds of other demonstrators rallied peacefully.
Meanwhile in New York, several hundred Tibetan activists rallied outside the Chinese consulate Sunday chanting 'Free Tibet Now' and 'Shame, Shame, China Shame'. They urged an end to the violence and for a boycott of the Games.
Riot police and around a dozen officers mounted on horseback were on hand after protesters earlier threw rocks at the consulate, and two people were arrested, police said.
One demonstrator from Washington, 32-year-old Dhondup Tseten, called on Olympic organisers to reconsider China as a host of this year's Games.
'China has a very old record of abusing human rights. The Olympic Committee knows that. I don't know why they're still letting China host these Olympics,' he said at the New York rally, while saying he would support the Dalai Lama.
However, the exiled spiritual leader of Tibet said on Sunday he was opposed to any boycott of the Olympic Games.
He also called for an international inquiry into the deadly riots in the Tibetan capital Lhasa and condemned China's 'reign of terror'. German Chancellor Angela Merkel, who angered Beijing last September when she met with the Dalai Lama, warned on Sunday that a boycott of the Olympics could exacerbate the situation in China, while France also rejected the idea.
'What we would like is that full light is shed on these events, as quickly as possible, and that peaceful demonstrators who were jailed be released,' France's junior minister for human rights, Mr Rama Yade, told Europe 1 radio.
Italian Foreign Minister Massimo D'Alema also called on China to end its 'unacceptable' crackdown and 'engage in a dialogue with representatives of the Tibet people, starting with the Dalai Lama', according to the Ansa news agency.
The unrest in Tibet followed three days of protests by hundreds of monks in Lhasa, India and elsewhere around the world marking the anniversary of a failed 1959 uprising against Chinese rule.
The violence has left at least 80 people dead, according to Tibet's government-in-exile, although Chinese state-run media put the toll at 10. -- AFP