Thirty-eight people were injured, six of them hospitalized, after a United Airlines flight from Nigeria to Washington, D.C., experienced problems midair, Nigerian officials said.

The nature of the emergency wasn’t entirely clear, but video verified by NBC News shows the passenger cabin of the Boeing 787-8 in disarray after the incident, meal trays and food strewn about the floor and some of the aircraft’s headliner separated from the cabin’s ceiling.

The Federal Airports Authority of Nigeria said the United flight departed from Lagos at 11:59 p.m. local time Thursday (5:59 p.m. ET). It returned to Murtala Muhammed International Airport at 3:22 a.m. Friday (9:22 p.m. ET Thursday) following an emergency “hours” after takeoff, the agency said.

United Airlines said in a statement Saturday that Flight 613 with 245 passengers, eight crew members, and three pilots returned safely to Lagos following “a technical issue and an unexpected aircraft movement.”

The airline described the six people hospitalized as four passengers and two flight attendants who suffered minor injuries. Nigeria’s airports authority said in its own statement that the six suffered “serious” injuries and were stabilized at area medical facilities before being taken to Duchess Hospital in Ikeja.