The Belarusian State Border Commission said the Polish Mi-24 military helicopter crossed the border "at an extremely low altitude, flew to a depth of up to 1,200 metres into the territory of Belarus, and then turned back". Belarus' Foreign Ministry, in a statement quoted by the official BelTA news agency, said it had summoned the Polish charge d'affaires and demanded an investigation. "Appropriate explanations were demanded from the Polish side and the conduct of a thorough investigation into the incident," the ministry statement said.