Russian police have detained more than 170 participants of a forum of independent members of municipal councils, a move that comes amid the authorities’ multi-pronged crackdown on dissent.

Police attended the gathering in Moscow shortly after it opened, saying that all those present would be detained for taking part in an event arranged by an “undesirable” organisation.

A police officer leading the raid said the detainees would be taken to police stations and charged with administrative violations.

OVD-Info, an independent group monitoring arrests and political repression, said that more than 170 participants in the forum were detained.

The gathering was organised by the United Democrats, a group led by politician Andrei Pivovarov. He also played a leading role in Open Russia, a group funded by self-exiled Russian tycoon Mikhail Khodorkovsky. Mr Khodorkovsky moved to London after spending 10 years in prison in Russia on charges widely seen as political revenge for challenging president Vladimir Putin’s rule.

A 2015 law introduced criminal punishment for membership of “undesirable” organisations. The government has used the law to ban about 30 groups, including Open Russia.

An earlier law obliged non-governmental organisations that receive foreign funding and engage in activities loosely described as political to register as “foreign agents”.

The laws have been widely criticised as part of the Kremlin’s efforts to stifle dissent, but the Russian authorities have described them as a fit response to alleged Western efforts to undermine the country.

The police crackdown on Saturday’s forum follows the arrest and imprisonment of Russian opposition leader Alexei Navalny.

Mr Putin’s most determined political foe was arrested on January 17 upon returning from Germany, where he spent five months recovering from a nerve-agent poisoning that he blames on the Kremlin. Russian authorities have rejected the accusation.

Last month, Mr Navalny was sentenced to two-and-a-half years in prison for violating the terms of his probation while convalescing in Germany – charges he dismissed as a Kremlin vendetta. His arrest and imprisonment triggered a wave of protests across Russia, to which the authorities responded with a massive crackdown.

The government has intensified its crackdown on the opposition ahead of parliamentary elections set for September as the popularity of the main Kremlin-backed party, United Russia, has dwindled.