facing this city. after our darkest of nights manchester is waking up to the most difficult of dawns. these were children, young people and their families, those responsible chose to terrorize and kill. this was an evil act. police later detonated a suspicious package but it was later determined to be just clothing. following the attack ariana grande tweeted broken from the bottom of my heart. i am so, so sorry. i don t have words. joinin joinings us live matt bradley. what are authorities saying as they begin the hunt for clues and more importantly, do they feel that there are any other potential attacks out there? what are they telling the public to do at this stage? reporter: amber rudd has come out and advised the british public to call in if they notice