Lashkar-e-Tayiba operative Abu Jindal, who was arrested in Delhi on Monday, was once called Syed Zabiuddin Syed Zakiuddin Ansari, according to police records. He was a member of the Students Islamic Movement of India in the 1990s and was known simply as Ansari.
He was given the alias of Abu Jundal after he joined the Lashkar.
Abu Jundal became a person of interest for the police when he plotted the assassination of Gujarat Chief Minister Narendra Modi, but the plan failed.
Jundal joined Lashkar after 2002 and he was handed over the charge of the terror outfit's operations in Maharashtra. He mainly operated out of Aurangabad.
In 2005, he received a huge cache of arms and ammunition from Pakistan and planned to carry out a major fidayeen attack. But the police got to know about the attack plan and foiled it by arresting 11 members of the LeT and SIMI.
Jundal managed to escape the police crackdown; he is suspected to have fled to Karachi.
The police suspected that Jundal had a role in orchestrating the 2006 serial train blasts. He helped the Lashkar set up camps in Maharashtra and his contacts in the state helped him gather information.
Intelligence Bureau investigators suspect that Jundal could have been the person who identified the Nariman House in Mumbai for the 26/11 attacks.
