The U.S. National Transportation Safety Board said on Monday it is investigating a United Airlines flight on Friday from Lagos, Nigeria to Washington D.C., in which a sudden aircraft movement led to injuries of passengers and cabin crew.

The authorities in Nigeria said that the United Airlines plane had to return to Lagos after the episode. Six people were treated at a hospital, officials said.

In a statement on X, formerly known as Twitter, the NTSB said that it was investigating the January 24 incident involving a United Airlines Boeing 787-8, registered as N27903, which was operating flight UA613 from Lagos Murtala Mohammed Airport (LOS) to Washington Dulles International Airport (IAD).

Six people were taken to hospital, and many more were injured after a United Airlines flight from Lagos heading to Washington D.C. experienced a sudden in-flight movement. The United States has opened a probe into the unexpected movement, as the cause is still unknown.

A United Airlines flight to Washington, DC, was forced to make an emergency landing after the Boeing plane abruptly plunged in midair, hurting nearly 40 people onboard, including six

Nearly 40 people were injured, with six seriously injured, when a Boeing aircraft operated by United Airlines suddenly plunged in mid-air, forcing the fight to make an emergency landing. According to CNN,