Iqbal Attarwala, an alleged associate of fugitive underworld dons Dawood Ibrahim and Chhota Shakeel, arrived in Mumbai on Thursday after being deported from Dubai.
Police officials took Attarwala into custody at the Chhatrapati Shivaji International Airport here, his lawyer Sushan Kunjuraman said.
"This is an illegal detention and I will be complaining against the same. He had come from Dubai to surrender but was taken into custody at the airport itself," Kunjuraman added.
Attarwala's son was waiting for him at the airport.
Wanted in several cases of murder and kidnapping, Attarwala went to the Middle East in 2004 after he was shown as a wanted accused in a land grabbing case here. He also has a case of extortion and cheating registered against him.
A plot measuring over 2,000 square feet owned by one Ranchodbhai Patel in suburban Malad was allegedly grabbed by Attarwala along with over 30 armed accomplices.
They allegedly removed Patel's security, installed their own men and then submitted some bogus documents claiming right over the property.
The case is being investigated by the Mumbai police which has already arrested six persons in connection of the case.