Poland blast 'unlikely' to have been caused by missile fired from Russia, Biden says – video

Joe Biden says the US and its Nato allies are investigating a blast that killed two people in Poland. Asked whether Russia was involved in the blast, Biden said it was 'unlikely in the lines of the trajectory that it was fired from Russia, but we'll see'. Poland summoned Russia's ambassador to Warsaw for an explanation after Moscow denied it was responsible

• Poland explosion unlikely to spark escalation - but risks of Nato-Russia clash are real
• Poland missile unlikely' to have been fired from Russia, Biden says