Police in the Indian capital, Delhi, say they have arrested two key members of the "Indian branch" of al-Qaeda.
They say the arrests are a significant blow to the group's operations in the sub-continent.
One of those detained is Muhammad Asif who is a founding member of al-Qaeda in the region, foreign media reports.
Al-Qaeda set up its South Asian operation just over a year ago, saying it brought together militant groups from across the region.
The group has said it was behind the killings of four secular bloggers in Bangladesh as well as several attacks in Pakistan.
Indian authorities said the two arrested men were involved in recruiting young Indians to the group.