The missile landed outside the rural Polish village of Przewodow, about four miles (6.4 kilometers) west from the Ukrainian border on Tuesday afternoon, roughly the same time as Russia launched its biggest wave of missile attacks on Ukrainian cities in more than a month.Speaking to reporters after holding an emergency meeting with G7 and NATO leaders on the sidelines of the G20 summit, US President Joe Biden said preliminary information suggested it was "unlikely" the missile was fired from within Russia, but was unable to say conclusively until the investigation was complete."We agreed to support Poland's investigation into the explosion ... And I'm going to make sure we figure out exactly what happened," Biden said, adding the leaders offered sympathy over the death of two people.The Kremlin has denied involvement in the explosion, with Russia's Defense Ministry calling the reports by Polish media, who first reported the deaths,"a deliberate provocation in order to escalate the situation," according to a short statement late Tuesday.It added that the photos of wreckage published by Polish media "from the scene in the village of Przewodow have nothing to do with Russian weapons.""