Abu Jindal Hamza, an Indian mastermind in the Mumbai terror attack and an alleged member of the Indian Mujahideen group, has been finally arrested, officials said Monday.

Hamza, 30, was arrested at the Indira Gandhi International Airport here June 21 after his deportation from Saudi Arabia, a police officer said. A court sent him to 15 days police custody.

Hamza was one of six people who were holed up in a “control room” in Karachi and directing the audacious Mumbai attack by 10 Pakistani terrorists in November 2008.

The carnage left 166 people dead. He was one of those who were heard on radio intercepts directing the terrorists to their targets in Mumbai and telling them who to kill. He had trained the killers to speak Hindi.

Hamza had told the Pakistani terrorists to convey to the media that the Mumbai attack was “just a trailer and the movie was still to come”.

In the intercepted tapes, he spoke in Hindi and told the terrorists not to reveal their Pakistani identity. He wanted them to instead claim they belonged to Toli Chowk in Hyderabad and were members of a supposedly homegrown ‘Deccan Mujahideen’ group.

Some said Hamza, whose real name is Sayyad Zabiuddin, was a more important catch than even Kasab, the only one among the 10 Pakistanis who was caught.

An electrician by training, he had studied at the Indian Technical Institute in Beed, his home district in Maharashtra.