The probe into the Ayodhya attack is veering around to the banned Students' Islamic Movement of India with investigators believing that some of its members 'provided logistical support' to the five slain militants who tried to storm the makeshift temple complex on July 5.
Erstwhile top leaders of the organisation 'are under the scanner', intelligence officials said.
The organisation continues to function under a different garb even though it was banned after suspected involvement
of its activists in the Sabarmati Express train blast at Rauza Gaon railway station on August 15, 2001, they said.
Investigators were quizzing the SIMI activists arrested since Sunday for 'possible leads'.
Mohammad Ahmed and Kamil alias Kajjan were picked up from Lalbagh area in Ayodhya on Sunday while Zameer, a former SIMI district president, and Tanveer were arrested on Monday.
The four are members of an extended family and were also arrested during a crackdown a few years ago. They were
acquitted by a local court recently, the officials said.
Another member of the family, Aqil, was allegedly involved in the Sabarmati Express blast.
Younis, the driver of the jeep by which the militants travelled to Gosainganj, was also being interrogated, but there
were 'some contradictions' in his statement, they said.