On Sunday, police carried out searches in Manchester's Moss Side and the Old Trafford area, where a 25-year-old man was arrested. "So if there is a need for more recruitment or more security or more armed vehicles, which we are investing in as well, we'll look at doing that", Rudd said during the state-funded BBC's Andrew Marr Show.
Police released photographs from security cameras showing Abedi on the night of the massacre, wearing jeans and trainers, a black bodywarmer and a baseball cap, with the straps of his backpack visible on his shoulders.
Police launched fresh raids and arrested two more people Sunday in connection with the Manchester bombing, as thousands defied the terror threat to take part in the city´s annual half marathon. Eleven other men, aged between 18 and 44, are in custody.
Grande, meanwhile, promised to return to "the incredibly fearless city of Manchester" to hold a benefit concert for the victims.
Greater Manchester Police have made an appeal to the public for information about the bomber's movements since 18 May, when he returned to the UK.
Pope Francis recites the Regina Coeli prayer from his studio's window overlooking St. Peter's Square at the Vatican, Sunday, May 28, 2017.
The decision to lower the threat rating from its highest level was made by the country's Joint Terrorism Analysis Centre in light of the arrests made in the Manchester attack investigation, May said.
Peter Hook, a member of seminal Manchester band New Order, was among the runners and said the tragedy had brought people together.
British authorities say they have disrupted five plots since March 22, when a terror attack outside Parliament in London left five people dead.
Abedi had been a former "subject of interest" to MI5, but Ms Rudd said: "The intelligence services are still collecting information about him and about the people around him".
Manchester police did not say where and at what time were filmed.
"But I would not rush to conclusions, as you seem to be, that they have somehow missed something".
The statement released through police added: "I wish I could say that Georgina is one of the last to die in this way but unless our Government opens its eyes we know we are only another in a long line of parents on a list that continues to grow".