American Airlines flight from Miami to Mexico City canceled after 'security concern'

• An American Airlines flight was evacuated on Thursday following a "security concern," according to the Miami International Airport.
• An American Airlines spokesman said the threat was "non-credible" and that the flight was canceled.
• Miami-Dade police launched an investigation, tweeting that "all passengers have been contained."

An American Airlines flight bound for Mexico City was canceled on Thursday after a "security concern," at Miami International Airport.

Passengers from American Airlines Flight 257, which was bound for Mexico City, were asked to leave the aircraft.

The threat was "non-credible," said American Airlines spokesman Ross Feinstein. He added that passengers were rebooked on other flights and that American added an additional flight from Miami to Mexico City.

Miami Airport tweet: .@MiamiDadePD is investigating a security concern related to @AmericanAir flight #257 that was bound for Mexico City. The passengers on that flight have been evacuated from the aircraft.

Police in Miami said they were investigating.

"All passengers have been contained and safety protocols have been set in place. Adjacent gates have been cleared," the Miami-Dade Police Department tweeted.