Dallas police say in a Twitter post that the fire erupted when they used robots to clear the van of weapons such as pipe bombs.
Earlier, the suspect was confirmed dead in the van after a police sniper shot him. Police have not identified him for sure, although the suspect told police before he died that his name was James Boulware.
No one else was killed or injured in the attack, which left the police headquarters riddled with bullets.
1:10 p.m. (CDT)
Police have confirmed the death of a man suspected of opening fire on police headquarters in Dallas.
Police spokesman Maj. Max Geron confirmed the suspect's death on the department's Twitter feed Saturday.
Police earlier Saturday said the suspect had identified himself as James Boulware and said he blamed police for losing custody of his son and "accusing him of being a terrorist."
However, police say the suspect may not have given his real name and they haven't publicly confirmed the man's identity.
Authorities say the suspect opened fire on Dallas' police headquarters and engaged in a shootout with officers before fleeing in his van. Police surrounded it in a parking lot in nearby Hutchins, where a police sniper later shot him.
12:05 p.m. (CDT)
Authorities have found at least two additional pipe bombs in a vehicle used by the suspect in the Dallas police headquarters shooting.
Police spokesman Maj. Max Geron confirmed the discovery on the Dallas police department's Twitter account.
Authorities are using a camera equipped robot to check whether the suspect is dead in his van.
Dallas Police Chief David Brown earlier said the suspect had identified himself as James Boulware and told police that he blamed them for losing custody of his son. But police said investigators were still trying to confirm his identity, pointing out that the suspect could have been lying to them.
11:25 a.m. (CDT)
Authorities are using a camera-equipped robot to check whether the suspect in an early-morning attack on Dallas police headquarters is dead in his van.
Police spokesman Maj. Max Geron said on the Dallas department's Twitter account Saturday that it is likely the suspect is dead, but that it can't be confirmed until officers can move in.
Police Chief David Brown said a police sniper shot the suspect shortly after 5 a.m. while he was holed up in his van in a parking lot in the suburb of Hutchins. He said officers hadn't heard from the man for several hours since.
Brown says the suspect opened fire on Dallas police headquarters at around 12:30 a.m. and shot several squad cars before taking off in the van. Nobody was hurt or killed except for the suspect.
(An earlier version of this story erroneously reported that police had confirmed the death of the suspect. While police believe the suspect in the attack on Dallas police headquarters is dead, they haven't confirmed that yet.)
10:20 a.m. (CDT)
People are being allowed to return to their homes near Dallas police headquarters following an early-morning attack that eventually ended with the suspect being shot.
Public transportation also resumed in the area near where gunfire before dawn Saturday left parts of police headquarters riddled with bullets.
Chief David Brown says a police sniper shot the suspect who was parked in a van outside a fast-food restaurant in Hutchins, about 10 miles south of Dallas. Police hours later were still trying to determine if the suspect died in the gunfire and whether his armored-type vehicle was rigged to explode.
No officers or civilians were hurt.
A statement from the American Red Cross says evacuated residents were being allowed to return home around 10 a.m. CDT Saturday.
8:45 a.m. (CDT)
Dallas' police chief says a sniper has shot the suspect in an overnight attack on police headquarters and that the department is checking to see if he's still alive.
Police Chief David Brown says an officer shot the suspect Saturday morning while the suspect was holed up in a van in a parking lot in the Dallas suburb of Hutchins. He says the man told police he had explosives in the van.
Brown says investigators believe the man acted alone in the early-morning attack on Dallas police headquarters, despite early witness reports that others may have taken part. Police recovered two explosive devices near the building.
Brown says the man identified himself as James Boulware and said he blamed police for losing custody of his son and "accusing him of being a terrorist."
7:10 a.m. (CDT)
Dallas officers shut down streets near police headquarters following gunfire targeting the multilevel building in a former warehouse district known for apartments, live music venues and restaurants.
No officers were hurt around 12:30 a.m. Saturday as one or possibly more people in an armored-style van began shooting at police headquarters, located in the southern part of Dallas. Some patrol cars had bullet holes in their windshields.
A standoff with the male suspect continued in the parking lot of a fast-food restaurant along Interstate 45 in Hutchins, just south of Dallas. Police negotiators were trying to get the man to surrender.
Dallas Area Rapid Transit suspended light rail service in the area at the request of police. Rail and also bus service was halted to the neighborhood including the Dallas Convention Center. Traffic was being diverted from a section of I-45 closed down amid the standoff.
Several tactical officers were seen walking outside police headquarters as dawn broke Saturday. Patrol cars with flashing lights remained on eerily empty streets that were closed amid the investigation.
6:50 a.m. (CDT)
Police say conflicting witness accounts make it difficult to immediately determine how many shooters were involved when gunshots were fired at officers outside Dallas Police headquarters.
Dallas Police Chief David Brown says one man fled the scene being and chased by police in what witnesses described as an armored van.
Police said conflicting witness accounts made it difficult to immediately determine a motive.
Brown said during a news conference that the shootout began about 12:30 a.m. Saturday, when the suspects parked in front of the building located south of downtown and began firing. He said at least one of the suspects fled the scene in a van that rammed a police cruiser before leading police on a chase that ended in an ongoing standoff at parking lot in the nearby suburb of Hutchins, where additional gunfire was exchanged.
Brown said the suspect driving the van has told officers that he blames police for losing custody of his son and "accusing him of being a terrorist." The gunman also said he had explosives in the van, which appeared to be outfitted with gun ports in the sides.
Brown said negotiations with that suspect and the SWAT unit are ongoing. No injuries were reported.