Russian investigators are probing an incident at Moscow Sheremetyevo airport during which a Smartwings Boeing 737 veered off the runway after commencing its take-off roll.
The aircraft had been operating flight QS1003 to Prague when the incident occurred at 14:16 on 13 January.
Runway 24C was temporarily closed and departing flights were transferred to the southern parallel runway 24L.
None of the 40 passengers and seven crew members was injured, says Sheremetyevo airport's operator.
It states that the Czech aircraft "rolled off the runway" as it accelerated. Normal operations at the airport have since been restored, it adds.
While the airport had experienced snowfall, visibility and weather conditions at the time of the incident were good.
There are unconfirmed indications that the aircraft involved was a 737-900ER (OK-TSM), a 12-year old airframe originally delivered to SpiceJet.
Investigators have yet to determine the circumstances of the event.