and us presidentjoe biden has said that putin is to blame. navalny s widow yulia, is due to address european foreign ministers in brussels today, on the invitation of the eu s foreign policy chiefjoseph borrell. the bbc s chief international correspondent lyse doucet spoke with him about the significance of the invitation, and the wider concerns around russia and ukraine. it is a way of, first, honouring navalny. secondly, to express our deep sorry for this death and third, and maybe the most important thing, is to provide a voice to the russian opposition. because in russia, there are people who want to live in freedom as you and me and these people have been fighting, together with navalny. and many which are anonymous has also been sent to jail and may be dead and these people deserve support. that was joseph borrell. let s speak to our eastern europe correspondent sarah rainsford. the suggestion is that some kind of investigation is taking place and that that has been