Any of you US lot have more (up to date) info?
http://www.bbc.co.uk/news/world-us-canada-33121180Shots have been fired from an armoured vehicle at the police headquarters in Dallas, Texas, police say.
The vehicle drove off, pursued by dozens of police cars, and is now involved in a stand-off in a car park, officials said.
There has been an exchange of gunfire in the car park, they added.
A bag left outside the police station was later confirmed to contain explosives including pipe bombs, police said on Twitter.
The motive for the shooting is not yet clear.
Dallas police say no police officers have been injured.