Ace Worldwide News Group 13:16 on 13/06/2015 @FoxNews #Dallas Explosives found after gunmen opened fire on Police outside HQ @AceBreakingNews DEVELOPING: Explosives found after gunmen open fire on Dallas police outside headquarters http://t.co/QE0V5cLT5E #DallasPDShooting — Fox News (@FoxNews) June 13, 2015 @AceNewsServices