dozens of people escaped and frederick nowak at that concert with his 23-year-old son told the telegraph, about 30 minutes into the concert i saw two men firing into the crowd. and first hid behind a speaker. the men were firing, he said wildly into the crowd and people on the ground, then, he said he followed people at the right of the stage that led to stairs but the doors off the stairs were locked. he goes on, people were stuck there about ten minutes and there were 30 or 40 people. then, we went up the stairs arriving at the roof. got out through a window and saw a man in his apartment waving to us. he let us in through his attic window. we stayed there until hearing the police raiding the venue. he said he got a look at one shooter. he said the guy was young, in his 20s and dressed casually. in the end it would appear they were all dressed casually. none wearing masks. now, to figure out who they were and why they did this. and if, in fact an orring niedzed terror group will claim responsibility. our coverage continues with a reset at the bottom of the hour, right after this. ♪ it'