A Delhi court sent Fasih Mahmood, suspected Indian Mujahideen (IM) terrorist and an accused in Delhi and Bangalore blasts, to 10-day police custody on Monday evening by a magistrate.
Fasih's counsel SI Alam said he was remanded to Delhi police special cell.
Fasih was deported from Saudi Arabia on Monday and was arrested by the special cell at IGI airport. He was detained in Saudi Arabia in May this year.
His elder brother Sabih Mahmood said he met Fasih along with his counsel on Tuesday for 20-25 minutes at the special cell office here.
Sabih said, "I'm not saying whether my brother is guilty. There are courts of law to decide that. All I know is that, in the end, only the truth will prevail."
A mechanical engineer from Bihar, Fasih is accused of being the "key facilitator" for 15 suspected Indian Mujahideen terrorists who were arrested from Bihar, Uttar Pradesh and a few other places late last year.
He is also accused of being involved in the 2010 blast in Bangalore's Chinnaswamy Stadium and Jama Masjid shootout in Delhi, along with seven other IM men - Mohammed Qateel Siddiqui, Aftab Alam, Mohammed Tariq Anjum Hassan, Gayur Ahmad Jamali and Gauhar Aziz Khomaini - all arrested by the special cell.
Two others, Kamal Hassan and Mohammed Kafeel Akhtar, were arrested by the Bangalore police.
Fasih's name had cropped up during interrogation of the suspected IM terrorists arrested in the last one year. While the Saudi authorities confirmed his detention there, they conveyed that they were closely examining his role and stay in that country.
Fasih's wife Nikhat Parveen had approached the Supreme Court claiming that her husband was in the custody of Indian security agencies, a charge denied by the government. Fasih's father, Firoz Ahmad, is in-charge of a primary health centre in Bihar's Madhubani district and his mother is a school teacher in Darbhanga district.