Chief Metropolitan Magistrate Vinod Yadav sent Kazmi in judicial custody till April 7 even as the police was earlier given his custody till March 27.
The Special Cell of Delhi Police told the court that Kazmi was not required for further interrogation and more information would be gathered only after the arrest of other accused in the Israeli diplomat attack case.
The move comes after the Delhi Police was specifically told by CMM Yadav on March 21 not to permit any other probe agency to interrogate Kazmi.
The court`s order came on Kazmi`s plea alleging he was being "interrogated by officials of other investigating agencies, like Mossad of Israel, RAW, IB and others".
The court had, however, said the police were not barred from sharing information with other investigating agencies like RAW and IB and those of other countries, particularly of Israel and Iran, as India is a signatory to the UN Convention of Prevention and Suppression of Terrorism (Implementation of Security Council Resolution), 2007.
The Delhi Police had denied the allegation, saying so far no agency of any other country, particularly Mossad, has come to interrogate Kazmi and his application has been filed merely on apprehension.
Kazmi was arrested on March 7 and remanded in police custody for 20 days. Kazmi had moved the court last week alleging custodial harassment and said besides Delhi Police "Israeli officials (Israeli Intelligence Agency Mossad etc) are lined up to interrogate him daily and during his interrogation, they do not wear uniform to hide their identities."
He had also alleged he is being forced to "confess a crime he never committed."
Kazmi, who claims to have been writing for an Iranian publication, was picked up by the Special Cell of Delhi Police after the probe showed he had been in touch with a suspect who is believed to have stuck the magnetic bomb on Israeli diplomat Tal Yehoshua`s car on February 13.
Yehoshua and an Indian driver of the Embassy vehicle were among the four people injured in the blast.