Following Kyiv’s demand for access to the blast site, the Polish president’s senior foreign policy advisor said on Thursday that Ukraine is likely to be granted access to the site in southeast Poland where a missile killed two people.

In order to gain access to the explosion site, the United States and Poland, the two countries leading the inquiry, would need to agree, according to Polish President Andrzej Duda on Wednesday.

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Warsaw asserts that the explosion was most likely brought on by a Ukrainian air defence missile that misfired; Kyiv disputes this.

Jakub Kumoch informed the private network TVN 24, “A Polish-American investigating team is on site.”

“The Ukrainians asked for access to the site of the investigation. If both parties agree, and as far as I know there will be no objection from the American side, such access could be obtained soon.”

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Jacek Siewiera, the director of Poland’s national security bureau, also said that, as far as he knew, Duda was not against having Ukrainian observers there.

Kumoch said that Poland had video documentation of the explosion.

“There are indeed film materials, I would not like to talk about the content of the film materials that I saw in classified mode, but of course the prime minister gave such information, such materials exist,” Kumoch added.

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“These are our normal photos from the border, where you can see certain things. You see shots over Ukraine, fighting over Ukraine, and at some point, in a very short time, you see a certain sequence of events,” Kumoch claimed.

Kumoch gave no additional information. According to him, he wanted the Ukrainians to become familiar with these materials and the investigators first.