A man attempted to set a fire on board a China flight but was restrained by passengers and crew members and taken into custody, the aviation authority said.
The attempted arson happened on board a Shenzhen Airlines flight from the city of Taizhou to Guangzhou near Hong Kong, the Civil Aviation Administration of China said.
It said an investigation was under way but gave no other details.
Pictures of the incident showed a partially charred passenger seat and a blackened emergency exit door.
Official broadcaster CCTV and other state media reported that the pilot issued a mayday call and the plane was guided into Guangzhou airport. Slides were deployed and 95 passengers and nine crew members were evacuated. Two people were injured.
The incident appears to point to a serious breakdown in security at Taizhou airport. China bans the carrying of cigarette lighters and flammable substances, including spirits, aboard all flights.
A statement from Shenzhen Airlines confirmed the incident but offered no further details.