Polish President Andrzej Duda said on Wednesday that access to the site of the explosion would require the agreement of both countries leading the investigation, Poland and the United States.
"The Ukrainians asked for access to the site of the investigation.
You see shots over Ukraine, fighting over Ukraine, and at some point, in a very short time, you see a certain sequence of events," he added.
Police officers walk near the site of an explosion in Przewodow, a village in eastern Poland near the border with Ukraine, November 16, 2022.
Przewodow is less than 10 kilometres away from one of the two power lines linking Poland and Ukraine.