CBI sources said the clippings are belived to be of an ethnic attack on a hostel in Gossaigaon in Kokrajhar but refused to give further details about the incident.
They said the clippings have been procured from some news channels as well as people who have recorded these videos on their phones.
The agency team camping in Assam has also appealed to people to come forward and share any information they might be having about the clashes.
The agency is also likely to issue telephone numbers on which such information can be given to it, they said.
They said CFSL team which has reached the sites where these incidents took place has started collecting evidence from the places of occurance.
The Central Forensice Sciences Laboratory is trying to gather forensic evidence from the sites of violence to ascertain the types of weapons which could have been used by the miscreants during clashes, CBI sources said.
CBI has constituted a team under two DIGs to probe seven violence cases registered by it in three districts of lower Assam -- Kokrajhar, Chirang and Dhubri.
The clashes between Bodos and immigrants have left at least 77 people dead and more than four lakh homeless.
