Additional Sessions Judge Reetesh Singh sent the accused persons -- Mohd Sajid, Shakir and Sameer -- to jail till June 6 after the special cell of Delhi police submitted that their further custodial interrogation was not required in the case.
The accused were produced before the court after expiry of their police custody.
Earlier, the court had extended the police custody of the accused as the police told the court that they were required to be quizzed to unearth the larger conspiracy.
Delhi Police had detained around 10 more persons suspected to be linked with a terror outfit planning an attack in the city and recovered explosives from their possession after a series of overnight raids in the national capital and neighbouring states.
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However, they were later let off after questioning.
The special cell teams had conducted raids in Delhi and UP in a joint operation of Delhi Police and a central intelligence agency.