Delta flight from Barcelona to Boston makes emergency landing in Portugal after onboard problem

A Delta flight from Barcelona to Boston made an emergency landing in Porto, Portugal, on Sunday afternoon after a problem was reported on board.

Flight DL251 was diverted to Porto and landed safely, the airline announced. According to data from Flightradar24, the plane departed Barcelona at around 3:15 p.m. and arrived in Porto at around 5:45 p.m.

The aircraft, an Airbus A330, was carrying passengers who received medical assistance after landing at Francisco Sá Carneiro airport. According to the Portuguese emergency authorities, eight people were treated on the runway, while three others were taken to hospital.

A spokesman for the Portuguese emergency and civil protection authority said the emergency landing was caused by the presence of smoke in the aircraft cabin.