PITTSBURGH (KDKA) — FBI Pittsburgh officials, Pittsburgh Police, the bomb squad and other investigators converged on the local FBI headquarters on the South Side Thursday morning when a car spray-painted with a bizarre message was found parked outside the back gate.

The first reports of law enforcement activity along East Carson Street came in around 5 a.m. when security agents noticed someone drive the sedan up to the gate.

Crews from the Pittsburgh Fire Marine Division were also called to the scene.

Investigators focused on a car parked at the back of the building. A firetruck was brought in to put a barrier up near the orange-colored vehicle while the initial investigation was being conducted.

A bomb squad robot performed a sweep inside the car. It was spotted on the passenger side of the vehicle early this morning.

#FBI Pittsburgh continues to investigate a suspicious car that was parked outside our office before 5am this morning. It had non threatening language painted on it. We are currently working to talk with owner of that car. Follow us for updates as they become available. pic.twitter.com/EZCncoMXye — FBI Pittsburgh (@FBIPittsburgh) October 31, 2019

An FBI spokesperson tells KDKA’s Lisa Washington that “language” was found painted on the driver’s side door of the car.

UPDATE: Just spoke to an @FBIPittsburgh spokesperson. She confirmed the bomb squad is looking at the car parked near the building. There is “language ” written on the side of the car. @PropelSchools and Center for Victims. near the FBI building, are opening as scheduled. #KDKA — Lisa Washington (@LisaWashing) October 31, 2019

The message is written in white spray paint and all capital letters.

It reads: “Russia plants micro radio devices in ppls ears and controls them using a sound similar to a dog whistle. Subliminal hypnosis.”

The Propel School and Center for Victims, located near the FBI office, opened their doors on schedule.

“There were not initial indications that there was any concern for public safety, but out of an abundance of caution we did alert the Propel School and the Center for Victims Services here next to us, as well as the Steelers facility,” FBI Pittsburgh spokeswoman Catherine Polichiccio said.

Pittsburgh Police said they were assisting in the investigation.

Stay with KDKA for the latest on this developing story.