(CNN) – Baltimore authorities are investigating after photos emerged showing a sign inside the door of a police van that reads, “Enjoy your ride, cuz we sure will!”
The photos are circulating amid simmering tensions over the death of Freddie Gray in police custody, which set off protests and riots in Baltimore this year.
Prosecutors say Gray suffered a critical neck injury in April after being left handcuffed and shackled in the back of a Baltimore police transport van that made several stops. Six police officers have been indicted on charges connected to his death.
The city’s police department was quick to criticize the sign on the van door after the photos came to light Thursday.