Police then chased the van to a fast food restaurant down Interstate 45, where a standoff ensued as officers and the driver exchanged gunfire.
The driver told officers he blames police for losing custody of his son and \"accusing him of being a terrorist,\" said Brown.
No officers were injured in the shootings.
Police also found four bags -- including at least one that contained pipe bombs -- around the department's headquarters. Bomb squad technicians detonated the explosives. When police detonated the van, it caught fire and police said rounds could be heard going off inside. Police also found two pipe bombs inside the van.
Brown said all seven patrol stations were searched and cleared of any explosives.
The sheriff's office in Pickens County, South Carolina, has confirmed to ABC News that they have been contacted by the Dallas Police Department regarding the blue van used in the shooting.
The van matches the description of one recently sold in Georgia, but there has been no confirmation yet whether it is, in fact, the vehicle used this morning.
Get real-time updates as this story unfolds. To start, just \"star\" this story in ABC News' phone app. Download ABC News for iPhone here or ABC News for Android here.
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