Indian authorities say they have arrested a man they claim is linked to the Sri Lanka attacks on Easter Sunday.
The bombings killed more than 250 people and wounded 500 others.
India's National Investigative Agency (NIA) said Mohammad Azharuddin, 32, was friends on Facebook with Zahran Hashim, the alleged ringleader of the attacks, claimed by Islamic State (IS).
The arrest followed raids on a suspected IS militant cell in the southern Indian city of Coimbatore.
Five other men have also been detained for questioning.