Former Russian President Dmitry Medvedev has warned that the missile explosion which killed two persons in Poland has brought the West closer to World War III, the media reported.

The incident "proves just one thing: waging a hybrid war against Russia, the West moves closer to the World War", the ex-president, who is now the deputy chair of Russia's Security Council, wrote on Twitter on Wednesday. He also put the words "missile strike" in quotation marks, RT reported.

Medvedev's words were echoed by Russia's deputy representative to the UN, Dmitry Polyansky, who claimed there was "an obvious attempt to provoke a direct military confrontation between NATO and Russia, with all the ensuing consequences for the whole world".

In a post on Telegram, Polyansky said it was "suspicious" that last week Western powers had asked for a UN Security Council session to be held this Wednesday, without naming the reason for the gathering, and that the alleged "missile attack" on Poland came just in time for the meeting, RT reported.

Another source of doubt was the "instant hysteria of the Kiev regime and demands to punish Russia, which were backed by the Poles, who have already gone mad from Russophobia", the diplomat wrote.

With all facts pointing to Russia having nothing to do with the incident, it would be "curious" to see how the US and its allies will try to extricate themselves during the upcoming UN Security Council session, Polyansky said.

"It would be unthinkable for our Western partners to recognize the role of Ukraine and Poland in this dangerous provocation," he added.

Ukrainian President Vladimir Zelensky was quick to blame Russia for the incident late on Tuesday, urging NATO, of which Poland is a member, to act against this "attack on collective security".

Despite not being backed by any proof, the claims were picked by the media in Poland and by some of the country's officials, RT reported.

Warsaw put its military on alert, and said it was discussing whether to invoke NATO's Article 4, which would require consultations on the situation with the other 29 member states and a consensus decision on how to proceed.

Russia's Defence Ministry has insisted that it did not carry out any strikes near the Ukrainian-Polish border on Tuesday.

It later clarified that analysis of photos from the site showed that the debris were from a missile for the S-300 air defence system operated by Ukraine's military. (SJ/IANS)