The London-Beijing flight with 270 passengers and 16 crew landed in Irkutsk, Eastern Siberia, at 10.41 local time on Wednesday.
Police hold 28 year old woman after 400 people were evacuated and one flight was delayed.
A new direct international flight have started on April 1 between Irkutsk and the key Chinese trading city of Guangzhou.
Flights from east of Russian resumed for the first time since last year's earthquake and tsunami which led to the Fukushima Daiichi nuclear disaster.
The beaches here are thronged with sun-seekers, children paddle in the warm waters — even the babushki are relaxed.