AMSTERDAM: A pilot accidentally triggered a hijacking/hostage-taking alarmin a plane`s cockpit, causing a major security lockdown on Wednesday atAmsterdam`s Schiphol airport, one of Europe`s busiest.

An investigation is underway to determine what went wrong, Dutch militarypolice said.

“In a plane (set to fly) from Amsterdam to Madrid tonight an alarm wasaccidentally activated which set off safety protocols at the airport,”Spanish-owned Air Europa said. “There was no cause for alarm.

All passengers were fine and waiting for the flight to take off.”