Warsaw: No concrete evidence on who fired missile

STORY: Two people were killed in the explosion in Przewodow, about 6 km (3.5 miles) from the border with Ukraine, firefighters said. Media reports said the strike hit a grain-drying facility.

"We do not have any conclusive evidence at the moment as to who launched this missile ... it was most likely a Russian-made missile, but this is all still under investigation at the moment," Andrzej Duda told reporters in the early hours.

The Polish foreign ministry had earlier said that a Russian-made rocket had fallen on the village.

Duda said that it was very likely that Poland would request consultations under Article 4 of the NATO military alliance following the blast.

Duda spoke after Prime Minister Mateusz Morawiecki said that Poland would increase surveillance of its airspace following the incident.