NEW DELHI - A Delhi court on April 15 extended the detention of politician Arvind Kejriwal in a graft case until April 23, legal news website Live Law reported, a setback to the opposition, which needs him to campaign in the general election that begins this week.

The Enforcement Directorate (ED), India’s financial crime-fighting agency, arrested Kejriwal, the chief minister of the national capital territory of Delhi, in a graft case related to the city’s liquor policy and he had been held in custody until April 15.

The opposition leader has challenged his arrest, saying it is unlawful and, in a separate hearing on April 15, the Supreme Court of India asked the ED to respond to the challenge in the week of April 29, after which it will hear the case.

Kejriwal is a fierce critic of Prime Minister Narendra Modi and rejects the charges against him and other opposition leaders as politically motivated.

Mr Modi and his Bharatiya Janata Party (BJP) deny the accusations and say law enforcement agencies operate independently.

Kejriwal’s March 21 arrest sparked protests in Delhi and in the northern state of Punjab governed by his decade-old Aam Aadmi Party, and also drew the attention of the United States and Germany.

His detention has united the 27-party opposition alliance called India, which includes the Aam Aadmi Party and the Congress party, but opinion polls suggest the BJP has a strong lead over it and is likely to easily win a historic third term.

India starts voting in a seven-phase general election on April 19. The results will be out on June 4. REUTERS