Mumbai: A key accused in the Mumbai July 13, 2011, serial blasts had met Al Qaeda leader Osama Bin Laden in Pakistan in 2001 and trained under him, police said here on Tuesday.

The accused, identified as Haroon Rashid Abdul Hamid Naik, is currently in jail in another case."Naik, 35, had been earlier nabbed from the Mumbai international airport on charges of possessing fake currency notes on August 22 last year and since then was lodged in jail," said a Mumbai police Anti Terrorism Squad (ATS) officer, who did not want to be identified.

"Naik had undergone trainings called 'Daura-E-Aam' and 'Daura-E-Khas' in 2001 at terror camps of Lashkar-e-Taiba at Bahawalpur (Pakistan) after sneaking into Pakistan in late 2000," the officer added.

The July 13 serial blasts at close intervals shook the country's diamond and gold hubs -- Opera House and Zaveri Bazar -- and the busy commercial area of Dadar, killing at least 27 people and leaving around 125 injured.

The Mumbai ATS had on January 23 arrested two suspects -- Naki Ahmed Vasi Ahmed Shaikh, 22, and Nadeem Akhtar Ashfaque Shaikh, 23 -- in connection with the bombings. The ATS was also investigating Naik's role in the financial trail and the conspiracy in this case.