UK police name third London attacker as Youssef Zaghba

UK police have named Youssef Zaghba (right) as the third London attacker after Khuram Butt and Rachid Redouane were earlier announced He's a Moroccan-Italian who is reported to have been stopped at an airport in Italy on suspicion that he was bound for Syria. London's Metropolitan Police Service said 22-year-old Zaghba was not a "person of interest" before Saturday's attack.