Poland says it shot down Russian drones that violated its airspace

Poland's Prime Minister Donald Tusk said the country is at its closest to an open conflict since World War II, after accusing Russia's drones of violating its airspace. Poland said it identified at least 19 violations during a large Russian air attack on Ukraine overnight. Mr Tusk has urged NATO allies to come together to decide their next steps. Poland has invoked Article 4 of the defence alliance, which allows a NATO member to call for urgent talks if it feels that its territorial integrity, political independence or security has been threatened. Ross Cullen reports from Paris.