this is bbc news. these are the latest headlines in the uk and around the world... president biden has warned that vladimir putin could use chemical and biological weapons in ukraine. the white house also suggests russia could begin cyber—attacks in the us. he is considering using both of those. he has already used chemical weapons in the past, and we should be careful of what is about to come. he knows there will be severe consequences. ukraine's capital, kyiv, is once again under a curfew — it was put in place after eight people were killed in residential areas. one of the leading kremlin critics, alexei navalny, has been found guilty of large scale fraud by a russian court. there are calls for the 21 surrogate babies being cared for in a kyiv bomb shelter to be evacuated, as their intended parents can't travel to ukraine