...City and state police took to the air–clearly marked, they’re hard to miss.

Not so obvious was a single engine Cessna and a small Cessna jet–both were conducting aerial surveillance for the FBI.

The website www.flightradar24.com tracked them circling Baltimore–not during the riot–the FBI was watching last weekend when peaceful demonstrations were held.

The ACLU has filed a request with the FBI to learn what video and cell phone data was collected during the flights.

Baltimore police referred questions about the flights to the FBI.

At first, the local FBI field headquarters declined to comment, but in a statement to WJZ, it said:

“The aircraft were specifically used to assist in providing high altitude observation of potential criminal activity to enable rapid response by police officers on the ground. The FBI aircraft were not there to monitor lawfully protected first amendment activity.”

It’s not known just how much aid police on the ground received from the FBI’s planes....