A Delta flight was diverted Sunday after a flight attendant found a suspicious note in a lavatory, an official with the Transportation Security Administration told CNN.

The flight from Detroit headed to San Diego was diverted to Albuquerque, New Mexico, the FBI said, adding that it was informed of "a potential security threat" on the plane.

Flight 1706 landed in Albuquerque shortly before 10 a.m. (12 p.m. ET) and agents were on the scene to investigate, the FBI office in Albuquerque said.

A spokesman for Albuquerque International Sunport Airport said passengers deplaned and were "being checked out."

TSA spokeswoman Kristin Lee said the flight landed without incident, and that all passengers deplaned safely.