The co-pilot of a Germanwings jet that went down in the French Alps, killing 150 people, appears to have crashed the plane deliberately, a Marseille prosecutor said on Thursday.
The German citizen, left in sole control of the Airbus A320 after the captain left the cockpit, refused to re-open the door and pressed a button that sent the jet into its fatal descent, the prosecutor told a news conference carried on live television.
The co-pilot has been identified as 28-year-old Andreas Lubitz.
Marseille prosecutor Brice Robin said he had no known links with terrorism.
"There is no reason to suspect a terrorist attack," he said.
Asked whether he believed the crash that killed 150 people was the result of suicide, he said: "People who commit suicide usually do so alone....I don't call it a suicide."
Robin said the black-box cockpit recording recovered from the wreckage of the disaster suggested passengers did not realize what was happening until the last moment.