The NIA had detained 11 youth during raids at various places in the old quarters of Hyderabad on Wednesday.
A special NIA court here on Thursday sent five Islamic State (ISIS) suspects to judicial custody till July 14.
The five accused arrested by the National Investigation Agency (NIA) on Wednesday were produced before the court amid tight security at Nampally Criminal Court.
They were later shifted to Chanchalguda Central Jail.
The NIA also moved a petition seeking their custody. It will come up for hearing on Friday.
Earlier, the NIA quizzed the accused for a second day on Thursday for their alleged role in plans to attack locations across Hyderabad, an official said.
The NIA had detained 11 youth during raids at various places in the old quarters of Hyderabad on Wednesday. Six of them were later released.
All the suspects - aged between 20 and 42 - were allegedly plotting bomb attacks and indiscriminate firing at shopping malls and crowded places in Hyderabad, NIA sources had said.