Upset by a delayed flight, at least two Chinese passengers decided to open emergency exit doors in protest, forcing it to abort takeoff and landing them in jail instead, police said Sunday.

The latest in a growing number of air rage cases involving Chinese travellers happened in the early hours of Saturday morning in the southwestern city of Chengdu, after the China Eastern flight was delayed by a snow storm.

Angry passengers complained about the delay and a lack of ventilation, and a man surnamed Zhou opened three emergency exits to prevent the plane from taking off, forcing it to return to the gate, according to state broadcaster China Central Television. A total of 25 passengers — all part of a single tour group — were held for questioning while the rest continued on to Beijing aboard a separate flight.

Kunming police said in an online statement that Zhou and a tour guide named Li have been placed under 15-day "administrative detention" for opening the doors and inciting passengers with false information.

The plane's ventilation system had been turned off for 30 minutes during de-icing work to prevent fumes from entering the cabin, China Eastern maintenance engineer Zhu Yun told CCTV. Although the co-pilot had been dispatched to explain, passengers remained irate even after the plane left the gate, reports said.

"Opening those doors was extremely dangerous because there was nothing to protect passengers from the force of the engines," Zhu said.

World's worst record for flight delays

China's fast growing air-travel market is the world's second biggest, but heavy traffic and tight military control of airspace have given it the world's worst record for flight delays.

Cancellations, delays and service complaints spark frequent incidents of air rage at airports and aboard flights, including those to and from foreign destinations. Brawls between passengers and attacks on crew are often filmed and posted online.

Concerns over lengthy tarmac waits prompted U.S. aviation authorities to pass regulations in 2010 requiring planes to return to the gate after three hours.

China's National Tourism Administration said it fully supported the police action, and said it had ordered its Beijing and Kunming offices to carry out further investigations, suggesting more passengers could be implicated.