YEREVAN. – There is no obvious progress on March 1, 2008 case yet, head of investigatory group of Armenian Investigatory Service Vahagn Harutyunyan told the journalists on Wednesday. Prosecutor General’s Office regularly meets the journalists to secure thorough information on March 1 case to society.  Investigation looks forward to the assistance of society, particularly in investigating the ten victims’ circumstances. Harutyunyan also spoke on expertise of video tape available in the Internet. He assured there are no traces of video editing. However, it is not possible to identify people on the video. And ballistic expertise should be made referring the weapon on the video. It is possible that Armenian side will turn to foreign experts for assistance. “There is no necessity at the moment to interrogate the three presidents of Armenia. In case of necessity, I will do it,” he added. As a result of the operation to disperse an opposition rally collision occurred on March 1, 2008 in Yerevan. Eight civilians and two servicemen were killed.