Poland's foreign ministry says the missile which landed in its territory this morning was "Russian produced".It's the first official word from the European nation on the origin of the missile after an investigation was launched following the incident.Polish government spokesman Piotr Mueller said some military units have been put on alert while officials sought details.- Ardern expresses 'deep condolences' over Poland missile strike- Zelensky expresses solidarity with Poland after missiles land- Missile that hit Poland fired by Ukraine forces - US officials- MPs express 'deep concern' over missile strike on Poland- NATO will react to Russian missiles crossing into Poland - expertThe statements came shortly after Ukrainian President Volodymr Zelensky decried the missile strike as "a very significant escalation" of his country's war with Russia.Two people were killed by the missile strike that struck an area where grain was drying in Przewodów, a Polish village near the border with Ukraine."