TheNational Investigation Bureau (NIA) on Friday started interrogating Professorof Indian Institute of Technology, Guwahati (IIT-G) Arupjyoti Saikia at Sonapurbranch.

The NIA also interrogated the Adviser of Krishak Mukti Sangram Samiti, Hussain Mohammad Shahjahan.

Saikiawas also interrogated on February 3 for five hours.

As per reports, 42 scholars and academicians,including noted historian Ramachandra Guha, wrote to the NIA on Monday last insupport of IIT-Guwahati professor Arupjyoti Saikia.

NIA had summoned him as the witness of the casewhich the Krishak Mukti Sangram Samiti (KMSS) leader Akhil Gogoi has beenarrested on February 1.

It may be mentioned that Assam minister HimantaBiswa Sarma had indicated to a leading academician from the state, who tried toorchestrate the burning of the Assam Secretariat in Dispur.

Sarma had earlier hinted at having electronicevidence of a prominent intellectual from a Central Government institution whohad been coordinating with the attackers without giving out a name.