Federal air safety regulators have opened a fresh investigation into the Boeing 787 Dreamliner - after the firm said several employees had committed "misconduct" by falsely claiming tests had been completed.

The probe will look into whether Boeing completed inspections to confirm adequate bonding and grounding where the wings of certain 787 Dreamliner planes join the fuselage, the Federal Aviation Administration (FAA) said. The investigation will also look at "whether company employees may have falsified aircraft records.