UPDATE…7:50 EST…Headquarters on lockdown….Suspect in HQ parking lot…Shot was fired…Reporters told to stop all live feeds

Dallas Police have been alerted that a group from Houston was heading to Dallas to kill more cops.  Several SWAT teams have surrounded the downtown police headquarters.  Local Dallas reporters say officers told them shots have been fired and an ambulance was spotted on the scene.

From Breitbart News:

WFAA is reporting the Dallas police headquarters building is in lockdown and a SWAT team has been deployed after a threat was received. In a prepared statement Saturday evening, the Dallas PD said, “The Dallas Police Department received an anonymous threat against law enforcement across the city and has taken precautionary measures to heightened security.”

Dallas police are saying they received a credible threat that a group from Houston is claiming to be armed and headed to Dallas with the intent to kill more police officers, according to KTRK ABC13 in Houston.

UPDATE 6:12 p.m.: CBSDFW is reporting that at least one person from the Houston group has been seen in the Dallas area.

UPDATE 6:10 p.m.: WFAA is reporting the Dallas PD has initiated a “city-wide” roll call to verify the safety of every police officer in the city.

UPDATE 6:05 p.m.: WFAA reporter Rebecca Lopez said police told her they were looking for one man in the DPD parking garage. She was told to get back immediately. Many heavily armed SWAT officers were seen around the building with their rifles in a ready position.