Attackers opened fire on Dallas police headquarters early Saturday, then an armored van parked in front of the building drove off and rammed a squad car, reports CNN (http://cnn.it/1G0VXVG)
Police returned fire, and the van fled with the suspects.
After the attack, police found suspicious bags near the headquarters. At least one contained explosives, prompting evacuations from areas around the police headquarters.
As an explosives robot approached one of them, it blew up, Maj. Max Geron tweeted. No one was injured.
Authorities believe up to four people may have opened fire from various locations with automatic weapons, including from the van, said Police Chief David Brown.
Developing story …