Authorities say a security threat forced a flight from Dallas to San Diego to be diverted to Phoenix.

FBI Special Agent Perryn T. Collier says the American Airlines flight landed Sunday afternoon at Phoenix Sky Harbor International Airport.

Collier declined to discuss the security threat because of the active investigation.

American Airlines spokeswoman Michelle Mohr says Flight 362 landed safely shortly before noon and was met by authorities. Mohr says 179 passengers and six crew members were aboard.

She said the passengers were able to continue their trips and have reached San Diego. Mohr said she couldn't discuss security matters and referred questions to the FBI.