crews are out there, you want to watch out for crews on the scene stick to tabor road or the boulevard instead of montour street near mayfair. >> a gunman opened fire at a free speech event in texas. the included a prophet mohammed cartoon contest. katherine scott is live in the satellite center following the latest. >> reporter: good morning, tam so far authorities have not determined if the shooting was connected to the event going on inside. right now they are interviewing witnesses and they are trying to clear the scene of any potential threat. >> reporter: we evacuated businesses that were close by. >> reporter: a bomb squad in texas is searching a car for explosive devices as a precaution after a two men drove up to a controversial free speech event last night and opened fire. >> go in the build. >> reporter: it happened before 7:00 p.m. in a dallas suburb. police say the two men got out of the vehicle an started shooting hitting an unarmed security officer in the ankle. >> garland officers who were close by saw what was going on and engaged the two men shot and engaged them at t