Police in the Indian capital, Delhi, say they have arrested a key figure allegedly involved in the planning of the deadly Mumbai attacks of 2008.
Abu Hamza described as the "handler" of the 10 gunmen who carried out the assaults, has been remanded to police custody.
The attacks claimed 165 lives. Nine gunmen were also killed.
The 60-hour siege of Mumbai began on 26 November, 2008 luxury hotels, the main railway station and a Jewish cultural centre were the targets.
Relations between India and Pakistan hit rock bottom after India blamed the Pakistan-based militant group Lashkar-e-Taiba for the attacks.