 The Secretary-General of NATO, Jens Stoltenberg, expressed his shock at the news, while the UN Secretary-General, Antonio Guterres, condemned it unequivocally as an act of political violence. Briefly, there's time for a reminder you can listen to NewsHour whenever you like. Two editions a day. The latest is online and you can sign up for our free podcast by searching for BBC NewsHour podcast. I'm Paul Henley and this is the BBC World Service.