European airline Air Europa said a hijacking alarm that went off on one of its planes at Schiphol Airport in Amsterdam was a “false alarm” in a Wednesday tweet.

The airline said the alarm was a “warning that triggers protocols on hijackings” at Schiphol in the tweet.

“False Alarm. In the flight Amsterdam [to] Madrid, this afternoon was activated, by mistake, a warning that triggers protocols on hijackings at the airport. Nothing has happened, all passengers are safe and sound waiting to fly soon. We deeply apologize,” Air Europa wrote.

#AirEuropaInfo False Alarm. In the flight Amsterdam – Madrid, this afternoon was activated, by mistake, a warning that triggers protocols on hijackings at the airport. Nothing has happened, all passengers are safe and sound waiting to fly soon. We deeply apologize.

— Air Europa (@AirEuropa) November 6, 2019

The tweet came after Schiphol Airport’s official Twitter account said Dutch military police were investigating a “suspicious situation” on a plane and had evacuated passengers off the aircraft Wednesday evening.

“The Royal Netherlands Marechaussee is currently investigating a situation on board of a plane at Amsterdam Airport Schiphol. We keep you posted,” an initial tweet posted by the official account for Schiphol read, according to CNN.

The Royal Netherlands Marechaussee is currently investigating a situation on board of a plane at Amsterdam Airport Schiphol. We keep you posted. https://t.co/AxwMZ7CZtT

— Schiphol (@Schiphol) November 6, 2019

“Passengers and crew are safely off board. On-site research is still continuing,” another tweet from the airport posted several minutes later read.

Passengers and crew are safely off board. On-site research is still continuing. https://t.co/hZvl0Dq5ig

 

— Schiphol (@Schiphol) November 6, 2019

Police and ambulances were deployed near the aircraft being investigated, the BBC reported.

The airport is the third largest in Europe next to Heathrow in London and Charles de Gaulle in Paris.

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Image: Reuters.