FRANKFURT, June 4 (Reuters) – Several staff members were injured when the nose gear of a ‌Boeing 787 jetliner unexpectedly collapsed at a ‌gate at Frankfurt airport on Thursday, its operator Lufthansa said.

“Passengers had ​not yet boarded,” a company spokesperson said in an emailed statement, adding that crew members and ground staff were on board the aircraft at the time ‌of the incident, which ⁠was first reported by Bloomberg News.

“Several staff members were injured and are currently ⁠receiving medical treatment,” the company added.

A Boeing spokesperson said the company was aware of the incident and ​was supporting ​its customer but offered ​no further detail.

A Reuters ‌photographer saw multiple emergency vehicles parked around the two-engine widebody aircraft, which partly lay on its belly.

The incident occurred at 12:45 p.m. (1045 GMT), and the jet was scheduled to depart for Los Angeles as ‌flight LH450, Lufthansa said.

“We are ​currently investigating the exact circumstances ​with the relevant authorities,” ​the company added.

The 787, of which ‌Lufthansa operates the 787-9 variant, ​is a ​relatively new addition for the group, which is planning to gradually phase out less efficient jets ​and simplify its ‌fleet.

(Reporting by Kai Pfaffenbach in Frankfurt, Thomas ​Seythal in Berlin and David Shepardson, editing by ​Linda Pasquini, Kirsten Donovan)