Sent_en: 2ja According to a police official authorities had taken the threat seriously, even though no dangerous substances had been found on board the plane, and passengers had not been in danger.
Sent_yy: 警察当局によると、たとえ危険な物質が飛行機に見つからず、乗客は危険な状態になかったとしても、当局は脅威を深刻に受け取った。