TAMPA, Fla. (WFLA) — The FBI Tampa Field Office is searching for the person who wrote a bomb threat on an Allegiant flight at Florida’s St. Pete-Clearwater International Airport.

Investigators said the threat was found on Allegiant Airlines Flight #2006’s lavatory door on April 25. The flight was departing St. Pete-Clearwater Airport and headed to Cincinnati.

The flight crew discovered the threat while the plane was taxiing from the gate before departure.

The person wrote, “Bomb on flight check cargo. All Allegiant flight.”

The plane was evacuated but no device was found after an extensive search.

Anyone with information about the incident is asked to call the FBI’s Tampa Field Office at (813) 253-1000. You can also submit a tip online at tips.fbi.gov.