A pilot on an Air Europa plane accidentally set off an alarm, prompting a massive police response and a large security lockdown at Amsterdam’s Schiphol airport on Wednesday, the airline said in a statement.

“In a plane from Amsterdam to Madrid tonight an alarm was accidentally activated which set off safety protocols at the airport,” the Spanish airline said. “There was no cause for alarm, all passengers were fine and waiting for the flight to take off.”

It added: “We are sorry, there was no cause for alarm.”

Dutch police rushed to the airport — the third busiest in Europe, after London’s Heathrow and Paris Charles de Gaulle Airport — in response to a “suspicious situation,” the airport announced earlier.

It later added that “passengers and crew are safely off board.”

According to reports on Twitter, the plane was an outbound Air Europa flight to Madrid with at least 27 people aboard.

Dutch Prime Minister Mark Rutte told a meeting of his VVD party he may be called away because of the situation at Schiphol, according to the UK’s Guardian.

“Something is going on, we are going to find out what is going on,” he said. “I am being kept informed.”