Zabiuddin Ansari, also known as Abu Jundal, was arrested on his arrival at Delhi airport on Thursday, Press Trust of India news agency said.
He was deported from Saudi Arabia on India’s request, reports said.
Mr Ansari is being described as the “handler” of the 10 gunmen who carried out the assault on targets in Mumbai.
The attacks claimed 165 lives. Nine gunmen were also killed.
CONTINUED at BBC News.