A flight has been canceled after a 76-year-old woman was found flipping coins into aircraft engine, the airlines said Thursday.

The 8L9960 flight, scheduled Wednesday from Anqing, east China's Anhui Province, to Kunming, Yunnan Province, did not depart until 10 a.m. Thursday after a thorough safety check, said a statement by Lucky Air, a Kunming-based low-cost airline affiliated with HNA group.

The flight was grounded after airport workers noticed the woman, surnamed Fang, throwing something at the engine while boarding and later found a coin on the ground.

Fang is in police custody.

A similar case was reported in late June, when an 80-year-old woman tossed coins to the engine while boarding a China Southern Airlines flight. Neighbors of the suspect said that she was a Buddhist.