Interpol has issued a Red Corner notice for another Hyderabad youth in connection with last week's blasts - Mohammed Amjad alias Khaja, an alleged key operative of Harkat-Ul Jihad Islami (HUJI), is believed to be hiding in neighbouring Bangladesh.
Police sources said the Red Corner notice - alert issued by the Interpol on behalf of a country - against Amjad was issued after his name cropped up during investigations into the May 18 bomb blast at the historic Mecca Masjid, which had claimed nine lives.
The investigations against him intensified after the city was rocked by twin bomb blasts on Aug 25, killing 44 people.
Amjad's name has been added to the list of most wanted terrorists by Andhra Pradesh police for their role in various terror attacks during last four years.
Abdul Shahid alias Bilal, the HUJI commander for south India and mastermind of the blasts, tops the list, which also includes Abu Hamza alias Abdul Bari, reportedly arrested in Bangladesh two days ago.
Police said Amjad was wanted in various cases, including the 2005 blast at the police commissioner's task force office.
Interpol has already issued Red Corner notices against Bilal, who reportedly shuttles between Saudi Arabia, Pakistan and Bangladesh.
Investigations have revealed that Hamza was in the city in April and it was he who made the bomb that ripped through the 17th century mosque. This was revealed by Shaikh Nayeem alias Sameer, a native of Maharashtra who was recruited into HUJI by Amjad.
Sameer was caught in West Bengal along with three others while crossing into India in April. Arrested in the Mumbai train blasts case, he was brought to Hyderabad in connection with the mosque blast.
He also revealed during a narco analysis test that 10 kg of RDX was smuggled into Hyderabad and only a small part of it was used in the mosque blast.
With two other suspects revealing vital information during the narco tests in Bangalore and continuing arrests of more suspects here, police are trying to piece together the information.
Officials were stunned by revelations during a narco test on Syed Imran Khan, an executive of a corporate bank here who allegedly provided shelter to his relative Shoaib Jagirdar, a native of Maharashtra who was arrested during investigations into the mosque blast case.
Police further heightened vigil following Khan's sensational revelation Tuesday that two of four terrorists involved in the twin blasts could still be in Hyderabad.
He also told police that 10 kg of RDX brought into the city early this year was initially kept at his house in Bowenpally in Secunderabad before its distribution among different modules to carry out blasts.
Police are also continuing to probe the Bangladesh link in the terror attacks. Sources said vital clues were gathered from the house of Rizvan Gazi, a Bangladeshi whose sister was arrested here on Sunday.
Rizvan resembled the sketch of suspected bomb planter in Lumbini Park - one of the two places to be rocked on Aug 25. He reportedly managed to evade the Hyderabad police team twice in Bangalore during the last four days.
During the investigations, it was found that Rizvan, 22, made phone calls to Pakistan a day before the twin blasts. He also made calls to Bangladesh after the blasts.
Another Bangladeshi living in Bangalore is also reportedly involved. He travelled from Bangalore to Hyderabad before the blasts.