MI5 launches internal probe as Manchester marks week since attack

Britain's MI5 intelligence service has launched an internal probe into whether vital clues were missed ahead of the Manchester attack, as the city on Monday marked a week since the carnage that claimed 22 lives. As the number of people detained in Britain rose to 14 following an arrest early in the morning, police released CCTV images of 22-year-old attacker Salman Abedi carrying a large suitcase and appealed for information about the luggage. Manchester City Council has called a vigil in the centre of the northwest England city for 2131 GMT -- the exact moment that Abedi detonated his bomb outside a pop concert by teen idol Ariana Grande in one of Europe's biggest indoor arenas.