Saturday 13 June 2015 10.50 EDT Last modified on Saturday 13 June 2015 14.38 EDT  A photo provided by witness Anita Grendahl shows police responding moments after multiple shots were fired at their headquarters in Dallas early on Saturday morning. One man fled the scene, being chased by police in what witnesses described as an armored van.  A Dallas police department image shows gunshot damage to a squad car.  Another police photograph shows broken glass windows at the Dallas police headquarters.  Dallas police chief David Brown briefs the media. At least one gunman opened fire on officers outside police HQ, he said, spraying squad cars with bullets before fleeing in a van, which officers followed to a suburban parking lot and surrounded, beginning a standoff.  Police gather at the intersection of Interstate 45 and E Palestine Street, where they cornered a suspect in a van.  Dallas police officers prepare their rifles.  A sniper and a tactical officer take up positions on the shoulder of Interstate 45 at Dowdy Ferry Road, as the standoff develops.  Debris remains where an explosive ordnance robot attempted to move a bag, outside Dallas police HQ. Police said the robot was damaged in the resultant blast, but still operational.  A resident walks his dog past police blocking the road near Dallas police HQ.  A police robot approaches the armoured van as a SWAT team member stands guard.  A police officer, left, and FBI agent inspect the area surrounding the armored van. The suspect in the van was confirmed to be dead.  Evidence markers are seen on a sidewalk in front of Dallas police headquarters as members of the FBI evidence response team investigate.
At least one suspect fired multiple shots at officers before fleeing while injured in van, as police later found suspicious packages placed around headquarters