Security Heightened In Dallas After Police Receive Anonymous Threat: Report

Dallas police have received an anonymous threat against officers across the city, and the department is taking extra safety precautions, it said.

"The Dallas Police Department received an anonymous threat against law enforcement across the city and has taken precautionary measures [to heighten security]," Dallas police said in an emailed statement.

Police headquarters have been placed on lockdown and are surrounded by SWAT team vehicles, according to local media, which cited unnamed sources.