Huge anti-government demonstrations erupted in Russia’s far east on Saturday over the arrest of a popular governor who was replaced this week by a Kremlin appointee who has never lived in the fraught region.

Residents of Khabarovsk near the border with China took to the streets en masse for the third Saturday in a row after governor Sergei Furgal was arrested by federal law enforcement and flown to Moscow on murder charges this month.

These have been some of the largest anti-government protests in Russia in years, which the Kremlin said this week were being fuelled by opposition activists outside Khabarovsk.

Tens of thousands of residents marched through Khabarovsk waving the region’s flag, carrying banners and chanting slogans against the president, Vladimir Putin, as passing cars honked their horns in support.

“We want our governor to be released because we believe he was very likely detained illegally,” said 24-year-old protester Alina Slepova.

Furgal was removed by federal officials “for their own purposes, not for the good of our region”, she told AFP.

Demonstrators converged in front of the regional administrative building on Lenin square shouting “Freedom” and “Putin resign”.

Police wearing masks allowed the demonstrations to go ahead despite a ban on public gatherings as part of measures to contain the coronavirus pandemic.

The protests that initially erupted in response to the shock arrest of Furgal over murders that happened 15 years ago are increasingly becoming an outlet to vent frustration with the Kremlin.

“The centre is sucking resources from the far east,” said demonstrator Alexander Gogolev, 45, who voiced anger that the region receives “nothing in return”.

Estimates of the turnout varied greatly, with Khabarovsk officials saying that 6,500 people attended. Local media meanwhile said the number was closer to between 15,000 and 20,000.

Journalists reporting from the town, seven time zones east of Moscow, said Saturday’s rally was the largest since the demonstrations began this month.

Police in Moscow detained at least 10 people who gathered at Pushkin Square in support of the demonstrators in Khabarovsk, monitors said, and local media reported smaller protests in other eastern Russian cities including Vladivostok and Yuzhno-Sakhalinsk.

On Monday, Putin officially fired Furgal, 50, and appointed a lawmaker from the same nationalist LDPR party, Mikhail Degtyarev, as his acting replacement.

The move was met with anger from Khabarovsk residents who said the 39-year-old outsider lacked experience and had no connection to the region.

In a video posted to Instagram this week, Degtyarev dismissed calls for him to step down and said the mass demonstrations did not reflect broader public opinion.

Ahead of the demonstrations on Friday he suggested that foreign citizens had flown from Moscow to Khabarovsk to help organise the protests.

Kremlin spokesperson Dmitry Peskov dismissed claims of foreign interference but said the protests were a “nutrient … for troublemakers” and “pseudo-opposition” activists.

Opposition leader and one-time presidential hopeful Alexei Navalny has thrown his weight behind the protesters and this week said the demonstrations could only win concessions “with the support of the entire country”.

Furgal’s detention ahead of a trial in September sparked an outcry from his nationalist LDPR party whose firebrand leader Vladimir Zhirinovsky this week vowed to secure a presidential pardon if he was found guilty of the charges.

Russia’s Investigative Committee, which probes major crimes, said Furgal was charged with ordering the murders and attempted murders of several businessmen in 2004 and 2005.

Critics say the case is politically motivated after Furgal was elected with a large majority in 2018 in an embarrassing defeat for a candidate of the ruling party backed by Putin.

Meanwhile, 17 members of the Russian “United Democrats” movement, which campaigns for meaningful elections, were arrested in the western Tatarstan region on Saturday over their suspected role in “terrorism”, the group said.

Launched in 2018, United Democrats was formed by a group of independent candidates in municipal elections, battling for a fair fight at the polls.