Thirty-eight people were injured on a United Airlines flight that was headed last week to Washington, D.C., from Lagos, Nigeria, officials in Nigeria said, after the plane experienced what the airline described as “a technical issue and an unexpected aircraft movement.”

Six people were treated at a hospital for their injuries, Nigerian authorities and the airline said.

United described the injuries to the six people as “minor,” though Nigerian authorities described them as “serious.” Nigerian authorities also said 32 others on the flight had minor injuries.

Video and images on social media show the distress and disarray on the plane, with passengers speaking over one another as food and meal trays are strewed throughout the cabin.

United did not offer more details on what it said was a “technical issue” or about the extent of the movement or any potential causes.

— The New York Times