individual allies have already been providing ukraine with weapons and the meeting will discuss what more they can do. it comes as more explosions have been heard in western areas of kyiv, where the curfew residents have been under continues , it will last until thursday morning. in southern ukraine, evacuation buses and aid trucks remain blocked from entering the besieged city of mariupol. on tuesday, hundreds of cars were able to leave the port city along a humanitarian corridor. the ukrainian president, volodymyr zelensky, has said negotiations with russia are beginning to "sound more realistic" with further talks due to take place over a video link on wednesday. mr zelensky is due to address the us congress in the coming hours. with the latest, here'sjon kay. —— mark here is tim moffat.