Dallas police headquarters on lockdown after threat
Dallas police officials say officers are searching for a suspicious person in a parking garage next to its headquarters.
The police department also asked media not to broadcast live near the headquarters for the safety of officers. They say the headquarters building is not on lockdown and that no shots have been fired. They also say SWAT officers set off a device to enter a locked fence.
A nearby light rail station also was closed. The Dallas Transit agency cited "police activity."
A Dallas police spokeswoman said earlier Saturday that the department received an anonymous threat against law enforcement across the city and has tightened security.
The city is on edge since a sniper opened fire on officers guiding a protest march two days ago, killing five officers.