Passengers were evacuated from an American Airlines flight at New York's JFK airport Sunday morning as police investigate a bomb threat onboard.

According to the New York Fire Department, the threat was made over American Airlines Flight 67—a direct flight between Barcelona and New York—which landed at JFK on Runway 31 Sunday.

Port Authority police are reportedly searching the plane and the NYPD bomb squad and FDNY are on the scene. The threat may have been made by phone, WPIX reports.

Twenty-five units and 105 firefighters responded to the airport, the Daily News reports.

Passengers on the flight—including former UBS President and Chief Operating Officer Robert Wolf—have been tweeting live updates from the airfield:

Update 4 pm:

The flight was cleared this afternoon after authorities found "no evidence of any danger" on the plane.

[image via @robertwolf32]