Metropolitan Sessions Judge K Rajkumar allowed the NIA's petition seeking their custody and directed that the accused be produced before the court on July 12.
Mohammed Ibrahim Yazdani alias Ibbu, Habeeb Mohammed alias Sir, Mohammed Ilyas Yazdani, Abdullah Bin Ahmed Al Amoodi and Muzaffar Hussain Rizwan were arrested by NIA following a series of searches conducted at 10 locations in Old City area on June 29, with the assistance from Hyderabad Police. The agency had detained six others, including a techie, during the operation.
In its application, the investigating agency stated that the accused need to be taken to Maharashtra and Rajasthan and it also wanted to question them on the possibility of recovering more explosives.
During the arguments for police custody, NIA said they also wanted to probe the source of funding for the activities of the accused and about their contacts, if any.
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However, defence sought dismissal of the NIA petition, saying it is not maintainable.
NIA had claimed that the five men were getting instructions from the West Asia-based terrorist organisation ISIS for planning and carrying out terror acts in India.
Following its prior investigation, on June 22 NIA had lodged an FIR for "criminal conspiracy to wage war against the Government of India" by collecting weapons and explosive materials by targeting public places, religious sites and sensitive government buildings in various parts of India.
According to the agency, the gang was preparing improvised explosive devices for carrying out blasts, and was being guided by an online handler, suspected to be based in Iraq/Syria.