Investigators are inquiring into an overrun involving an Airbus A320 operated by Bulgarian charter company Air Via at Varna, located on the Black Sea coast.
The aircraft was conducting flight 502 from Leipzig, with 172 occupants, when the incident occurred at 10:19.
It overran the runway, passed through a fence and stopped in a field outside airport perimeter.
According to a Varna Emergency Service report given to Bulgarian media, two passengers were injured during the evacuation.
The reasons for the accident is being investigated by the Bulgarian civil aviation authorities.
Shortly before the landing strong rain accompanied by high winds hit the wider area of Varna. Immediately after the event Varna airport closed and all incoming flights diverted to Burgas.
Images of the aircraft do not indicate any significant damage, and suggest thrust reversers were deployed.
Air Via operates five A320s under dry-lease contracts. The aircraft involved is a relatively new A320 (LZ-MDR), which performed its first flight in May 2012.