Arvind Kejriwal detained: India's PM Narendra Modi criticised as protests held over political rival's arrest

India's prime minister has been labelled a "scared dictator" after a key opposition politician was detained.

Delhi's chief minister Arvind Kejriwal, a prominent anti-corruption campaigner, was arrested following a raid on Thursday night.

A court has ordered for him to be held in custody until 28 March.

Kejriwal leads the Aam Aadmi Party (AAP) - also known as the Common People's Party - and his arrest comes weeks before national elections are due to begin.

AAP is part of an alliance of opposition parties who have joined together as the main challenger to Narendra Modi's ruling Bharatiya Janata Party (BJP).

Rivals claim Mr Modi is using law enforcement agencies to orchestrate a crackdown, and Kejriwal's arrest sparked protests on Friday.

Thousands demonstrated in Delhi - with some shouting "death to democracy, long live Kejriwal!" - and security forces have been deployed.

India's Enforcement Directorate, a federal agency controlled by Mr Modi's government, has accused Kejriwal's party and ministers of accepting one billion rupees (£9.5m) in bribes over Delhi's alcohol policies.

The AAP has denied the "fabricated" allegations - and vowed that Kejriwal will remain the city's top elected official as he fights the case in court.

Political commentator Neerja Chowdhury said: "It looks like harassment because only opposition leaders are being singled out."

Noting that no investigations have been launched against members of Mr Modi's party, she added: "It's not a level playing field."

The government has been accused of misusing its power to harass and weaken political rivals - gaining an unfair advantage in the polls.

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A slew of raids, arrests and corruption investigations have been launched against opposition figures, with charges dropped against some who later joined Mr Modi's party.

The BJP says law enforcement agencies are acting independently of the government, with a spokesperson accusing Kejriwal's party of playing the "victim card".

Rahul Gandhi, leader of the opposition Congress party, wrote on X: "A scared dictator wants to create a dead democracy."

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Congress has separately accused the government of freezing its bank account in an attempt to cripple its election campaigning.

Meanwhile, AAP politician Raghav Chadha said: "India is under an undeclared emergency. Our democracy stands critically endangered today."

Kejriwal launched the AAP in 2012 and has campaigned on a promise to rid India's political system of corruption - with a broom as his party's logo.

India's general election is due to take place in seven phases from 19 April to 1 June, with results due to be declared three days later.

It is widely expected that Mr Modi will win a third term.