The U.S. National Transportation Safety Board (NTSB) is investigating a United Airlines flight incident that led to passenger and crew injuries following a sudden aircraft movement. The flight, en route from Lagos to Washington D.

In an update, Nigerian officials said an additional 27 passengers and 5 crew members suffered minor injuries in the incident. In all, 38 were hurt.

The US National Transportation Safety Board is investigating a United Airlines Holdings Inc. flight that turned back to Nigeria after a “sudden aircraft movement” occurred, injuring passengers and crew.

Six people were injured on a flight from Nigeria to Virginia. The airline also saw a series technical issues in March.

It is unclear what caused the jolt; United Airlines has said the cause was not severe turbulence, and that it is “working with aviation authorities in the US and Nigeria to understand the cause.”

The flight was diverted shortly after take-off due to a mid-air jolt which has injured several people - we'll be bringing you the latest updates, pictures and video on this breaking story

The plane headed back to Nigeria after experiencing "unexpected movement" mid-flight on Friday, Jan. 24, according to multiple reports

Six people were taken to hospital with injuries but have been discharged, United Airlines said.

The same United Airlines aircraft had a similar issue earlier this week, with a rapid altitude drop prompting a diversion.

United Airlines said it was cooperating with U.S. and Nigerian investigators to determine what exactly happened on the flight.

A United Airlines plane heading to a popular tourist destination was forced to make an emergency landing after it jolted mid-air, with the sudden plunge leaving passengers injured