He said Danish Ali, a close aide of Ibrahim's nephew Sohail Kaskar, was deported from the United States of America on November 15 last year following which the Mumbai police took him into custody last month.
Ali, however, managed to enter Russia a little while later on a student visa and regrouped with Kaskar for diamond smuggling operations after attending college there for two years, the police official said.
Russia is believed to have among the largest reserves of diamonds in the world and is a major exporter.
The duo came on the radar of US agencies when they moved to Spain from where they were nabbed, along with two Pakistani nationals, by these agencies, he said.
They were behind bars for a period of one-and-half years and were then turned over to the US Federal Bureau of Investigation (FBI) and remained in jail for another two-and-half years starting September 2015, the official informed.
Mumbai police demanded his custody from US authorities as Ali was wanted in an extortion case here, he said.
Accepting India's request, US authorities extradited Ali on November 15 last year, the official said.
He was handed over to Mumbai police in the first week of December last year and has been in jail since, he added.
The official said efforts were on to get Kaskar extradited as well.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)