A Polish military helicopter violated the Belarusian border, the Belarusian State Border Committee said on Friday.
"The Polish Mi-24 military helicopter crossed the state border at an extremely low altitude, flew to a depth of up to 1,200 meters into the territory of Belarus, and then turned back," the Committee said in a statement.
The Belarusian Ministry of Foreign Affairs said it had summoned the Polish charge d'affaires and demanded an investigation into the incident.
Poland's response to the accusation
A Polish helicopter did not cross the Belarus border on Friday, a Polish military operational command spokesman said, denying a claim from Minsk that such an incursion took place.
"I do not confirm this information, none of the Polish helicopters crossed the border into Belarus, such a border crossing could not have happened and it did not happen, our radar systems are unambiguous," Lieutenant Colonel Jacek Goryszewski said.