Transcript for New arrests in direct connection with Manchester attack

David, now to a new arrest in connection with the concert terror attack in the uk. British police carrying out more raids trying to root out a possible terror network and Matt Gutman is on the scene in Manchester this morning. Good morning, Matt. Reporter: Hurricane good morning, robin. Authorities say there are eight men total who have been arrested. All of them detained in connection to terrorism and as authorities try to close the noose on any possible accomplices they are scrambling to determine if there is a second device out there. In raid after raid authorities here racing to roll up a possible terror cell searches sweeping England. For the first time police with long guns patrolling trains. At one rate south of Manchester, the bomb squad moved in and hundreds forced out of their homes and into the streets. It is now a global investigation. Eight men in custody in England and the father and younger brother of 22-year-old Salman Abedi who detonated that bomb arrested in Libya. Authorities telling ABC news good progress is being made as they zero in on possible accomplices, they're now revealing more about his movements. In July of last year video shows him in this north African robe and just days before the attack at this shopping mall wearing the backpack suspecteds to have carried the bomb and Libyan authorities say just 15 minutes before detonating that device, he called his mother and brother asking for forgiveness and the last of the victims have been named and at this memorial site for them, we found this Muslim man weeping. Really, really breaks me. Reporter: He came here, he said because of the major's message of unity in the crowd we tracked down the mayor. I want to introduce you to the man would came up to you earlier. If we start thinking like that, we can start making a difference. A different philosophy. Reporter: Now the pressure is on that mayor and police here because this weekend the city is holding its biggest sporting event. That as authorities learned that he got through multiple European airports without being picked up three days before the attack. Matt, thanks very much.

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