VLADIVOSTOK, Russia, Dec 16 (Reuters) - Rising protests in Russia's Far East against higher import duties on used cars may be the first visible public anger at one of the government's responses to the global financial crisis.

Thousands gathered in Russia's largest Pacific port of Vladivostok on Sunday, some brandished posters critical of Prime Minister Vladimir Putin and others chanted for him to resign, witnesses said.

News coverage of the protests was limited mainly to the Russian internet and some newspapers because the main state-controlled television channels did not report them.

The duty is being raised to discourage Russian consumers from buying second-hand car imports and to prop up the struggling domestic motor industry, largely based around the Volga region cities like Togliatti, home of the Lada.

Large-scale protests in Russia are rare, with rallies by opposition political groups usually attracting no more than a few hundred people. But at least 3,000 gathered on Sunday, in a region where Japanese used car imports are popular.

"This kind of reaction to the suggested (car) measures could be predicted, but the scope and determination of the local people is linked to the crisis," Moscow Carnegie Centre political analyst, Masha Lipman, said.

Police clad in riot gear detained some protesters as other demonstrators blocked roads, lit flares and bonfires in Sunday's protests that blocked traffic in the city centre. A separate protest later blockaded the city's airport for a short period.

"Eighty five percent of local people are reliant on this business, take a look at us, we are not millionaires," said one protester, who only gave his first name, Sergei.

"Everything here has been bought by Muscovites. We only hear about Moscow, Moscow, Moscow," said another, implying far-flung regions were neglected in favour of the capital.